I got my VX smogged, and they told me I need to replace the gas cap as the gasket is leaking. Well, I got a salvaged gas cap and I suspect the gasket for that is starting to go as well.

Anyone know where I can get a new gasket? It's a round O-ring gasket, 2" od, 1 3/4" id, with an indent running along the outer edge.

Id prefer to just replace the gasket, as I cant find any new gas caps that have the tether.

Thanks