hey Jim,, haven't heard from in a while,,
I have found it much easier & less complicated to order a complete engine rebuild gasket kit,,, you'll get every single gasket,valve stem seals,fairly certain of half moons, bottom gasket,top cover,head gasket for the price of a single head gasket [can never have to many spares]
wouldn't worry bout your local dealer;; I deal direct with MAROOKA YAMAHA,,Bris,,[ google TEAM MOTO, then YAMAHA] or ring them and talk to GWILLAM[not a typo] in spares,,more than helpfull,,
he's linked up to all sorts of sites all over the world