Old Sacramento Armory has IMI Galil receivers for $229, but they may be running low. There are completely new Galil parts kits available from www.uzigalil.com for about $900. FAC, Southern Ohio Guns, JLD, Keystone Arms and others have the used kits for around $500. I got one from JLD and am very happy. The finish was almost completely gone, but everything was there and in good structural shape.
If you get a receiver and kit, you will probably need a new barrel, as the gas port needs to be drilled after headspacing. A few months ago, you could get barrels for $30-50 each, but I think the supply of cheap ones has dried up. Expect to pay about $150 for a new one now.
Five parts need to be replaced with US parts. AK trigger sets will work with slight Dremeling. AR15 brakes will work if they are re-tapped to 13x1 mm, and US made Galil pistol grips are available from Ace Ltd.
CDNN has fixed wooden stocks, or the folding stock can be sleeved and pinned/welded.
Here's a picture of my completed (non-refinished) Galil:
http://199.197.64.17/pics/galil/Rightside.jpeg