Check out www.sassnet.com
. It's the SASS website. Basically, you need a pair of single-action revolvers. Cimmaron makes a nice beginner gun. I shoot New Model Blackhawks, myself. You'll also need a lever-action rifle in pistol caliber, and a shotgun, pre-1900 (Coach, double-barrel, or pump). Clothing, just leather-soled boots (no treads), jeans, shirt and hat (no ball cap). Check out the pawn shops. There's some good groups up in the Ohio area.
Also on the Outdoor Channel, check out "Cowboys" on Wednesdays. It's about CAS.