new rack need ideas on what to fill it with

[Foschi Exotic Serpents]

have not heard about dwarf boas, how big do they get? do you have any links or care sheets you could recommend so i can learn more about them

Look here for info.
http://www.cuttingedgeherp.com/islandcayboas.html

Then look at the links on the side bar for Mexican boas, Nicaraguans, Central Americans, and Sabogaes.

There are a lot of dwarf boas and Vins page has a lot of info on many of them. The Sabogaes and the Tarahumaras are probably the smallest.