UPDATE: Door Drain Plug
GM Part 20046061 Has Been Superseded.
GM 20046061 is interchangeable with GM 20395138 since October 1, 1984 for the U.S. market.
How is the best way to do a "Dealership Search" ?
I have been searching occasionally for these plugs without success. Even inquiring on Craigslist under G Body - Salvaged Doors and asking if the doors have these plugs. These plugs do not cover the small drain holes in the door at the bottom seam but the oval hole next to them.