I can send you the stock plug and some $$ for your oil gauge if you don't want it. PM me if you like. If you want to keep the gauge I could still send you the plug. I'm in Oakland,CA
Damn! I was too slow, I would have liked that gauge too Sean, ha ha! oh well, the "plug" is metric, 20 x 1.5mm, don't go trying to screw anything into it like a pipe thread plug, you'll only bugger it up.
Get the right Honda gallery plug (Sean will have a spare or two) although I don't know WHY you want to get rid of it, an oil pressure gauge is designed to give you early warning of oil pressure loss and oil pump failure, but if you're content to rely on a 10 cent light bulb to protect your lubrication system, then take it off, at your peril! Cheers, Terry.