I've seen my LGS's work, he's very good. What I saw him do was a Model 8 Remington high grade rifle, and he duplicated it very well. Sent the checkering off, and it was VERY well done at 22 LPI.

His name is Tom and his number, if you're in or around GA, is 706-310-1234. He has a duplicating machine, but it still takes lots of fitting, as you probably know. Plus we're talking at least six months wait.