So I was taking my GSG 1911 .22 out of my safe a while back, fumbled it, and it landed on my concrete basement floor. Doh. Aside from a small dent in the frame it's fine, and I've function tested it with no issues. The problem is that the set screw for the rear sight must have been loose and it went missing after I dropped it. Anyone have any idea where I can buy a replacement rear sight?