The "dwarf" localities are primarily from Mexico and Central America. You can read about them and see pictures at http://www.cuttingedgeherp.com/. Your hypo boa looks nothing like the dwarf localities. I have three of the Tarahuras, one of the smallest of the locality boas, all in the 18-20 month old range. They aren't nearly as big as your guy is now.

Also people who breed the dwarf localities tend to keep them pure and not out-cross them with other BCI morphs.