I don't know of any that "specialize" in disabled cats, but I do know there are "special needs" cats at a lot of shelters throughout the country. One in particular is the one that SAS volunteers at in Vermont. Click Here to go to the thread where she posted about 30 cats that were found. Many of them had only one eye, although it sounds like most of them have found good homes already.

And I don't remember what shelter I was looking at on the web, but they had a kitty with only 3 legs, so you just have to do some searching. Petfinder.com is another good place to search for what you are looking for.

......45 minutes later after I get done checking out the poor kitties at on Petfinder....I want them all!!!!

Hope this helps you to find the kitty of your dreams.