I recently acquired a vintage Smith & Wesson model 15-3 K-38 Combat Masterpiece .38 Special revolver made in 1969. Pretty decent shape except the rear sight blade is bent on the left side. I'd like to replace the rear sight assembly with a new or used one. So far the problem has been that I can't find the correct one. I ordered one from Midway but it wouldn't fit. The front screw hole on the sight would not line up with the screw hole in the top strap. It was for a much newer gun. Close but no cigar. I also tried Numrich and eBay. So many variations for different barrel lengths and different generations of the model. I know the sight blade height is .106. other than that I'm kind of at a loss. Anyone know where I could get one? Also I know I could replace just the blade and for a lot less but I'm not sure I'm skilled enough to do that. Any help or sources would be appreciated.