I have a Silca Pista floor pump that I bought in the 80's. It has a brass dual valve head with a black rubber gasket which looks a bit worn. Inside the head, there was a brass washer type thing with a little tit on it. When you were pumping up a tire with a Shrader valve, the little tit depressed the valve stem. The tit broke off years ago and I can't pump up tires with Shrader valves with the pump anymore (no big deal because I have a Specialized Air Tool that I can use). I see that you can buy two different types of red gaskets for Silca pumps now. Does anyone know if I can stick either of those gaskets in my head or should I just spend the money on a new head assembly? I was hoping maybe someone here has the same pump head as I do and replaced the gasket with one of the new ones.

Bruce