Re: Remington 700 gunsmith in Arizona??
You could consider Ted Yost, located in Mesa, but I doubt he will take on the work. I was quoted 3 years turnaround on a 1911. Don't know about his rifle work timescale, but his work pistol work is top of the line.
Next up try Specialized Dynamics. Again in Mesa. Run by our very own Scotmilk9 here on the hide. Tell him Neil sent ya!
If Scott cannot do it, he will know who can. There are a couple of others, but these'd be the guys I'd go to.
Neil