http://www.gunpartsguy.com has kits, but they run at about $400 each. That's with everything other than the receiver, and including your 922r compliance parts.

I hear rumors that DSA has a few StG-58 kits sitting around, but those are rumors only. If I were looking to build one, and weren't wedded to wanting a Rhodesian, that's what I'd do.

Ohio Rapid Fire claims that they have metric receivers in production now, but I don't know how available they are.

http://www.falfiles.com know a lot more about FAL's than I do.

I have the AGI video and a SA/Rhodesian kit, just waiting on a receiver, and I live in Adams Cty. If you'd like to borrow the video, I just need it back sooner or later.