I have a poulan 306A and I need the gasket that goes between the tank/handle assembly. Does anyone know what I could use to make this myself? The gasket (what was left of it) is spongy and like 1/4 or5/16 thick it seems to need the thickness to fill the gap around the carb throat. I cant find anything in the parts store. also might need to be high heat resistant. Thanks, Nick.