They're looking great, Richard! BCA are awesome on so many levels. I was looking into them myself for a while and wouldn't be averse to bringing one home in the future, should I have the room.
Yeah, Allison/Crispysnakes has a good group of BCA. Both South Brazils and Bolivians. I don't think she's had any for sale yet, but I'm pretty sure her older BCA are coming up on breeding age.