1/2" Floor Plugs

I just bought a set of new 1" floor pan plugs for my jeep, but I also have several smaller holes in the floor with plugs in them. I'm guessing they're about 1/2" plugs. I didn't check them because I just figured when I looked around for the plugs on-line I'd see them listed as a standard size, but...all I can find are the 1" plugs.

Anyone got any idea on where I can find the plugs for these small holes?

I know they're available somewhere because some of my small holes still have the plugs in them.

 

If not Lowe's, McMaster-Carr - McMaster-Carr

 

Crap, I never even thought to check a hardware store Tim, but that makes sense. Just plugs for like the side of an electrical panel. I'm a dufus. But Thanks.

 

Electrical supply has em too

 

Body shop suppliers should have em too.