I think that it wouldn't hurt to ask them. If they say no, at least you tried, right!

The tigers that are at the Norfolk Zoo were taken in originally being someone's "pets". They also have an educational department where they teach groups about different animals and have a bunch of different reptiles and other animals that are kept behind the scenes for purposes like that. So you never know.

Maybe there are other educational groups local to you that may take one of your animals....??