I've made the clutch cover gasket, the valve cover gaskets are the same. The head gasket is different but standard will seal with half of a bolt hole hanging out. Really, it's the same with the clutch cover. Cometic will make gaskets on a custom basis. I considered contacting them for pricing of a batch of sandcast specific gaskets.
I'm guessing there were 7414 made with the 9 hole clutch cover and the head gasket continued to 23 or 26,000 bikes.