Overlooked makes and models need any support?

Any parts needed for the older 70's Dodge pickups - ie the bird bath hood stuff.
C-body parts?
80's Shelby cars?
AMC cars?

1970 Coronet tail panel? I don't think those have been reproduced?

Any emblems that aren't made? Plymouth Scamp, Pickups, C-body stuff, ect.

After a month or two, I will gather intell to see if any of the parts are being reproduced, are feasible to reproduce or just a general idea on what would be a sellable product.