Here is a very complete list. Of these I have bought mostly from AIM, Centerfire Systems, Century Arms, Cole distributing, J&G sales, and Southern Ohio guns.
These are mostly distributors of milsurps, and not collector antiques. When you send them a copy of your 03 FFL ask to be put on their mailing list to get flyers with what they have. Also many have email flyers as well.
http://milsurpshooter.net/topic/1187...=#.UDWZmsGPXEY
Also, this link keeps pretty well up to date on what is available, and where.
http://www.relic-arms.com/