Unlike ball pythons, my BRB's don't seem to get hooked on any one food source. If they think it's food they will grab it. They've taken mice, rats, ASF, chicks, rabbit kits, even ReptiLinks.
Find local rabbit breeders and ask if they'll sell or even give you any stillborn kits, or rabbit fuzzies that perish or have to be culled before reaching 65-70 grams, as long as the rabbits haven't been dead so long that they are stinking and putrid. The breeder should just put them into a plastic baggie and call you.