A number of the Revell 69 Camaro reissues came with stock hubcaps. I'm not sure what was in the center of the (Chevy emblem or lettering) but it's a start. Watching some of the kit reviews on YouTube will get you more specific information
Take a look at BCS trading on Ebay or BCS Models.com. He also does custom work so check him out. He custom made a camper top for my '77 Chevy C10 project. Preces are very reasonable too
Check out the content creators on YouTube, I'm sure they would be more than happy to supply you with one of theirs. Just search "model car building" an start choosing