Much thanks again to all for suggestions.

Guru, I've contacted my local suppliers and so far rolls of Gel are only available in widths of 48" x 25' cost is $149.+tax

So seems I either have to have dancers confine their moves which would preclude more than 1 at a time or, I hang two pieces side by side. (could a seam where the pieces meet be made invisible?)

Another option was suggested to me over the phone. And that was to go with a Diffusion Cloth. Much pricier.. 8' x 8' around $200. and up.

Lillienthal