I wonder - a splint, but like the stretchy ones for human knee support and stuff?

I Googled Orthotics for Pets/Cats - Knee braces for Cats....anyway, here is a link, though it is for dogs, which might give you some info. They may work with cats too!

http://www.orthopets.com/photo/index.html

AND a cat back leg brace....don't see no connections to the back of that cat here.

http://orthovet.com/catalog.php?cate...line%20Splints

Edit for 3rd time - prices better here!

http://www.handicappedpets.com/splints/index.htm

Maybe print these off and show them to your vet?

HUGS!