Well after a couple months of looking and sorting through the storage, I finally found the one remaining clock knob I knew I had.
I bought a fist full of these back in the 80's from an estate where the owner worked for GM.  It appeared these may have come out of the parts plant in a lunch box because upon further inspection, I found none of them were threaded.
Another member agreed to thread them for me several years ago in return for half the bounty. 
I was pretty sure I still had one left, just didn't know where it was.  Back in July, Lefty posted he couldn't find the one for his car during the re-assembly.  So if your still out there Lefty, send me an email Halletts1@chartermi.net