A Tisket a Tasket a Gasket
 

One probably can't get any cheaper than this, but does anyone know if there is a separate part no. for the gasket/o-ring that's found on the underside of the oil filler cap, not the one on the valve cover, but the one you see when turn the filler cap over? Mine could stand for replacement, and miser that I am, I can't see getting a whole new cap when the rest of it is fine.

HMMMM dont think i have ever seen 1...........you will prob have to buy a new cap