GA Precision used to at least when their GAP10 rifles were the Hogan/POF pattern. I had them build me one. It was when 6CM first came out, got all the brass and base die set from George. It was a damned laser. I even had my 10 y/o hitting 10 -12" plates at 1325 yds with me calling wind.
I haven't looked at them in years but I do know they use a different pattern upper/lower now - might be worth a look.