The actress Kirstie Alley had a rabbit, Strawberry I think his name was, that was paraplegic or had some similar condition. She kept him on soft stuff in a little kiddie pool in her bedroom. It was so touching.
I've seen a video (or maybe it was a manual?) being sold on how to care for a special needs bun. I saw it at For Other Living Things pet store in Sunnyvale, CA. I don't see it for sale on their website, but you could probably e-mail them and ask where you could get it. Sorry I can't be more specific but it's been awhile.
http://www.forotherlivingthings.comThere is also a DVD on
Planning Your Bunny's Assisted Living available at
https://www.bunnyrabbit.com/brcom.html. Look in the "videos" section.