Not to smart off but, "When you want a job done right, do it yourself." So my second suggestion is go to a machine shop, and have them make one. I'm sure they are all over Pittsburg, they are in Columbus, Ohio; and in small towns everywhere. It doesn't have to have true mechanical drawings, but a sketch with the dimensions on it (don't forget the thread pitch also). I've had local shops make and modify gun stuff for 40 years. It always helps if you provide the metal you want it made from too.
Ivan