Lanber from CDNN. Range from $499.00 to $649.00. Google it up and read the reviews. You will find very little negative. The ones from CDNN are "Blemished". My buddy bought one, and as best we could tell, the blemish was that the recoil pad wasn't a perfect fit. It wasn't far from perfect, but a little.
I have shot the gun a bit, and it is very solid.
http://www.cdnninvestments.com/dowournewcat.html