Check out the subspecies and locality information on
Cutting Edge Herp. Vin Russo's Website.
His book The Complete Boa Constrictor is great as well and worth the purchase price. Good pics and information on all localities and sub species.
Legacy Reptiles also has good photos of the different localities.
When / If you are ready to purchase, purchase from a breeder with tracable lines and lineage records... Lines going back to either of the breeders I've mentioned here should be good. There are a lot of mis-represented boas on the market and you do not want to purchase from a retail place like LLL, BHB, Underground, etc... they have cheap prices, but they purchase their snakes from breeders and their labeling is sometimes not accurate. A cross can get as large as a common boa, so it is important to know that you are buying what you want.
Setup and other husbandry is the same as other boas.
I have a Central American motley (basically a Nic. cross that isn't tracable back to Nicaragua) and he is a lot smaller than my common hypo and BCA.
CA and Nic. boas (and the smaller island localities) tend to be more defensive / nippy than their larger cousins, so expect that. That said, my CA motley has the same temperament as my others, so I got lucky.
As far as caging, etc. Boas need more room than a BP usually, as they are typically more active. a 4'x2'x15" (or taller) pvc cage with a climbing shelf or branch, etc. is pretty standard for housing adult males. My CA motley will be getting a cage like this, just as my other two boas have. The cage is pretty expensive, so housing in tubs at first or a rack while the boa grows is fine. You could also probably move one straight into a cage, even when small, with no issues. Boas tend to be bolder than BPs.