John Donovan at Donovan and Maggiora.
John was a frequent contributor to Orchid for many years. He sort of faded away from Orchid a couple years ago unfortunately after he and all the other jewelry artisans were forced out of the Phelan Building, but he and Jo-Ann are still crankin' out the jewelry.
You will not find anyone in SF that is more qualified to help you. Tell him I sent you, and that he ought to get back on Orchid.