I have quite a few Nic, and other dwarf, boas. It may be best to search for Central American boas instead of Nicaraguan. There is a lot of great info in Vin Russo's book The Complete Boa Constrictor. You can also check out his site http://www.cuttingedgeherp.com/, and also Gus Rentfro's site http://www.riobravoreptiles.com/. There are many other BCI boas in Central America that stay fairly small. Especially the insular boas.