Where to buy USGI M14 Magazines:
As of March 2001, the best source for USGI M14 Magazines is Cole Distibuting. Coles has a wide selection and excellent prices. I've ordered from them and was very happy with the items I received. Many list members seem to agree. Prices range from $31 (in quantity) to about $62 for collectables.
If you need an M14 rebuild kit, I would recommend Fulton Armory. Fulton is selling the kit at $14.95, and includes spring, follower and floor plate. The kits that I've seen appeared to be new, in excellect condition. You shouldn't need a rebuild kit for the magazines that you get from Coles, but it is nice to have a kit or two around for unexpected repairs.