Originally Posted by
oneclick
Simplest thing to do is cut a claw hanger and braze that bit on:
I had the same issue with my '74 Crescent. My local frame builder had NOS Campy hangers he could braze on. He filed the "wound" clean then filed the hanger to the length I asked for. Lined it up beautifully and kept the chain stay and seat stay wrapped in wet rags to minimize paint damage. IIRC he used a silver brazing material (silver solder???) as it was strong but melts at a lower temperature, again minimize paint damage. Came out just great and has held AOK for about 7 years and many miles now.
Good luck with yours.