Cabin top thru bolt Hole covers (?)

[abaragones]

Hi, by any chance someone here knows where can I get these covers for the cabin top thru bolt in my 322s? They cover a 1 inch hole, I am missing many and can't find them. I believe they are used in the 302 and 272 as well.
Thank you!
Abe

 

[jsalley]

I just bought some of these at Lowes in the hardware section, in the drawers that have the bolts/nuts/miscellaneous small parts.

 

[bria46]

McMaster Carr?

 

[abaragones]

Thanks!
Mcmaster Carr doesn't have them (grey), will check lowes.