Check out some of the items/kits sold on
ACKits.comThat site also has a forum with a pretty knowledgeable moderator. Prices are reasonable, too, from looking around a bit at other places
On a slight tangent: I dropped off my Mystique at a shop for A/C work -- bad cycling switch, bad relay, rusted-out condenser and accumulator. Wish I had a garage to do some of my own work...