Look in the Tool and Supply Catalog vol. lX from Indian Jewelers
Supply Company. They have a large variety of stamping dies they call
’Repousse Dies’ for making conchas and such. I believe IJS is the
featured die provider for the three books by Oscar T. Branson “Indian
Jewelry Making, vol.1, 2 and 3” which are excellent.
Almost forgot: Indian Jewelers Supply Company Gallup, New Mexico
87305-1174 1-800-545-6540 fax: 1-888-722-4172
Bill in Vista