A lot depends on your access to fabricating skills and materials. Take it from me that, within reason, any converter lens can be made to fit any camera, what's needed is a means to hold both in position.
The TCON300B above does not use filter threads to fix to the camera, including the one it was intended for. As far as I can tell this was to prevent damage to the front of the camera lens, due to the sheer weight. So let's discuss how we could mount such a thing to your camera, bearing in mind this principle can be applied to other lenses,
so long as we have the means to provide a mount that fixes to the lens.
The idea in my picture at the top of this thread is the use of a bracket between the two, the TCON300 has a tripod mount already fitted, so that stage is done, we just need a bracket to join that to the camera. So here's mine, a WIP as said, from that rig above:
It's just some aluminium plates, sandwiched together to make up the two heights needed. There needs to be some reasonable accuracy here, but not crazy numbers, within a millimeter off axis is fine I think, this one is about .5mm off at the moment. This will be made up by protective rubber or something when it's finished under the low side, in this case the camera.
The lens has a hardish rubber hood on its rear, with a recess which takes the front of the lens it was intended for. The filter thread on the camera lens is a 62mm, so by matching the inside and outside diameter of the normal lens we have the start of a means of coupling the two. The simple solution here is a step-up ring. These rings could also be used to reduce the hole size of the back of the 300, you just need to experiment a bit to find the right filter size that will allow a reasonable fit of the periphery of your Canon lens, with reasonable light blocking. I'd be tempted to look at rubber lens hoods too, they have tapered backs, and if you get one small enough you could trim off the back of it to the right distance to allow a snug fit over the ring that's around the outside of the lens on your camera. It may even be possible to get a rubber hood that is big enough on the front side to sit in, or over the rear of the TCON300. We need to get the lens as close to the camera as possible, but some gap in there is manageable.
The Canon MD160 has a tall body, so there's going to be a need for a big step in any bracket you make, but this is just about degrees.
The TCON14B could also fit your camera by the same means. This does have a 62mm filter thread, but our same step up ring will fit this too. All we need is a suitable means to mount it to our bracket, and the answer is one of these:
Coincidentally the rear end of the TCON14B is the same diameter as the Canon lens this was intended for, so this will give us our tripod mount to fix to our bracket.
When you come to check the alignment when making your bracket, set your video camera to max wide angle, this will introduce vignetting (all teleconverters do this), use the vignetting to aid centralising the camera to the lens.
You'll need to do some sourcing for suitable screws for the camera and lens mounting, and here's a lecture about this particular screw thread;
Our American cousins are generally under the illusion that the thread for tripod mounting is a 1/4" UNC (Unified Coarse), this is an American threadform, but here's the fact,
The actual thread is a 1/4" BSW (British Standard Whitworth).
1/4" UNC has the same pitch, the number of turns per inch, as the same sized BSW threads up to 1/2", but the actual form of the thread is different. Basically the angle of the threadform is 60 degrees on UNC, but 55 on BSW, this manifest itself as deeper threads on the BSW version. The net result is that only the tips of UNC screw threads will be in contact, this over pressurises the thread, and can lead to your stripping the tripod socket on your camera! Somehow Americans have convinced themselves that it's a threadform of their making, this tosh is all over the net, please don't fall into that. When you trawl the net for 'tripod screws' make sure it's either proper tripod screws, or search for 1/4" BSW. There's quite a few on ebay, in particular look for 'thumbscrews'.
Lecture over.
Remember that having consumed our tripod mounting holes that we will need a new one in the bottom of the joining bracket, for this you'll need a 'tap' of the right size, or if you can find something that has a female tripod screw hole in it, like a flash bracket etc, then bolt that on instead. The find the right place to put the tirpod hole, assemble the rig and holding it upside down find the balance point, that's where your hole needs to be.
To aid the steadying of long focus lenses I've made what is simply a balance beam, the arched shaped thing in the pic at the top. This adds weight and therefore stability to the moving camera. These are available commercially, but a bit of bent metal with adjustable weights on it is something I'm reluctant to pay over a hundred quid for to say the least. The commercial ones are called, er, 'The Trig Balance Beam' (inspirational!), and they can be seen here:
I can expand on that if needed, but it's simple enough really. If you can make the bracket to fix your teleconverter, you can make that too.
Is that a help?
adding tele lens to cannon md160 
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