Dear mid-60s Buick owners who want to cover every last detail . . . .
maybe! 
I don't know how you guys search eBay. I have tried to create a saved search that is only supposed to identify parts that will fit a 1964-65 Buick A-body. Alas, eBay sellers insist on listing everything and the kitchen sink as fitting such a car - including this item:
https://www.ebay.com/itm/Original-vintage-nos-50s-AAA-auto-club-license-plate-topper-bumper-emblem-old-gm/391942216900It is an immaculate AAA emblem, but $149?
I thought about watching to see if this guy could actually get this price, but on second-thought, I'm not sure I want to know!
Cheers, Edouard
