What size are you looking for?

Back in with winter 2001/2002 when I pluged the driver's side oil galley in my block, I think I used a 37/64" deep cupped plug since the 19/32" wasn't to be found. I am running the 0.090" hole in it, and it hadn't moved when I checked it last. That was in Oct 2003 when I had a valve job done. The block had 110 passes in 2002, and 159 more in 2003 by Oct. I pulled a lifter and stuck a probe back to touch the plug.

Measure the hole size in the block, the 37/64" or a 15mm if available might do the trick.