Where can I get these

[blown motor]

They're 3/16. I need eight.

[JS29]

NAPA has a great selection of body hardware.   

[Dakota]

This might be another source:

http://www.billrolikenterprises.com/products.asp?cat=10&pg=2

[anlauto]

I would try Nigel at National Moparts....I doubt I would have anything with a 3/16 thread 

[gzig5]

I'd try Megaparts. They have been very responsive and helpful.  Seem to have a very expansive selection.

If you can't find it, email them a pic or describe where it goes.

http://www.megapartsusa.com/

[Brads70]

Roseville via R/T specialties?