Hi Bob...and thanks,
Yup.. I spent some time down at our local Ace Place type hardware store. Nada Ting!...
I did buy some plain flat hinges that I might use if it looks like it might be an impossibility for the originals. I'll have to see if the lid prop giZZmo will work properly if I use them.. I think the center of the arc should be the same..

something to test out before I go to the trouble of drilling out the rivets.
I don't think I've ever seen one of these on Efray either. I'll put in a search/email deal at efray to monitor for one.
Thanks kindly for the ideas,
Buzz