Thanks Bob, but I don't have any right now. I bought a nice one from "Chitown Choppers" awhile ago, the adapter was crap (drilling and tapping your gallery plug is a bad idea, IMHO) but the gauge is excellent quality.
Make sure you buy an oil filled gauge, the sharp variations in oil pressure when you crank on the throttle can flick the needle right off a non oil damped gauge. Cheers, Terry.