I have an older CZ 85 which has an ambidextrous slide stop. I need to install a new right hand slide stop lever. The hole in the right side of the frame is .230" in diameter. The old right hand slide stops are designed to mount in holes of this diameter but they are no longer available. The new right hand slide stops are designed to mount in holes that are .250" in diameter. Thus, I want to find a machinist/smith who can mill the hole in my frame out to .250". Does anyone have any specific recommendations?