I am trying to replace a broken mainspring in a Russ Hamm flintlock. The pieces of the old spring are not available so there is no pattern or measurements to reference. Is there anyone here who is aware of anyone who may have an original mainspring, that could be purchased, photographed or measured? I prefer purchasing, but; that may not be an option. Any advise or suggestions would be most welcome. Lock measures 5" tip to tip, height bottom to top just rear of pan flair in front of cock is 3/4", mainspring hole to front of tumbler thumb (cock relaxed or fired position) is about 2 5/64 inches. I can provide photos is I can figure how to post them here on this forum.