I don't know if this fellow has any M715 gaskets, but he might be worth a shot. I know some of you guys running the Tornado are finding less and less gaskets available, so maybe this may be a source. I ran across his ad in an old Gas and Steam magazine. He's located in Port Orchard, WA.....

No searchable database, but he does have an inquiry form:

http://www.olsonsgaskets.com/index.html