Bare actions can be bought a lot of places. Ask your local gun shop, they should be able to order you one. If not, Ed's contenders (edstc.com), James Lewis (alewisenterprise.com), Fox ridge, and probably VVCG all have them if you call and ask specifically for a bare frame. James Lewis always has his bare frames on Auction Arms and Gunbroker for $199 blue, and $225 SS (there's a guy on AA called "GUNPA" that has them sometimes but I wouldn't recommend him after a bad experience prior to a sale).
Helicopter Bill