I also have used Numrich, GunPartsCorp.com quite a bit.They have a huge inventory of parts for old guns. You can order a catalog from them if you work on older guns on a regular basis and they have diagrams of the parts for many of the guns. You can even find new unissued barrels for many that have been in storage for years. If you love old guns, you can spend hours just reading and looking at the catalog or find the same info on line. If they don,t have it listed, call them at 1-866-686-7424 and sometimes they have the part and it is not listed online or in the catalog. Sometimes Brownells will have parts for older guns, and there is a place called Bobs gun Parts that I personally have never used. Good luck.