You could try to rehome them temporarily with a friend or family member until you get custody back. You could also explain the situation to the nearest reptile rescue; they'll often help out in situations like that.

As long as BPs are legal in your area, any decent attorney should be able to deal with that. There is no documentation of them inflicting any sort of serious injury to a child, and they are sold in almost all chain petstores as starter pets (clearly aimed at children whose parents will take care of the animal).