First off, no boa has to be fed rabbits. Any of them will do fine on large rats their whole life unless you get some mutant female BCC.
Second off, I would imagine their care would be the same as most south American boas. Mid to high 70s cool side, 88-90F hot spot and about 70-80% humidity. You can also just look up the average temps for Peru and go off that too.
Third off, I have heard if you buy from LLL, be prepared to get a 2 for 1 pet deal. You get a snake AND mites as a bonus pet. Also i'm not sure I would trust them for a more obscure species. I would go through a reputable breeder like Cutting Edge Herps or Legacy Reptiles.