Joanne, I'd be glad to share mine with you except that I have no way of contacting you. Your profile doesn't have your e-mail address and you didn't provide any contact information in your message.
I found myself in the same position last year. I had never had any dealings with Medallion Stamps before, but when I took over the compliance area for the bank that had acquired my institution, I found my duties included administration of the signature guarantee program. A quick review revealed that there was no comprehensive inventory of the stamps in circulation and no written policy. We developed one in short order and have very successfully implemented it. Post back here with contact information or contact me via my profile information and I'll share our materials.
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Jim Bedsole, CRCM, CBA, CFSA
Opinions expressed are my own, and do not necessarily reflect those of my employer.