I have 52 Henry J with the 6 cyl. Engine. I have ordered a carb gasket,which is the carb to manifold gasket. I don't this is the one I need. I'm looking for the insolator gasket.It's the one that is about 3/8 to 5/8 thick.It's lays on the intake manifold,then the carb gasket and then the carb.Can anyone tell me where I could get one? Thanks Larry