There are lots of antique airplanes flying with the large, historically correct, markings. I would not worry about a "Karen". We deal with them and FAA gets to handle them and explain that their fears have no basis in reality. Unless of course you actually plan to be flying under bridges...

The folks at EAA Antique Classic, or the Antique Airplane Association can likely give you the info that you want. Or maybe the Smithsonian. I have gotten drawings from the Smithsonian Air & Space folks. You have an excuse to meet new peers in the aviation world. No need to be bashful.

Best of luck,

Wes