Parts Books from 40s

Does anyone have access to parts books from 40s? I am trying to find application of the quarter panel I had for sale. I have a guy from Hemmings telling me its a Pontiac quarter. Though it looks close I am 99% sure is a Plymouth. Especially since the quarter was with a stash of parts for a 46 Plymouth rust bucket car that was on the property.

Or if you know someone who has one that isn't on this forum, let me know.

Greatly appreciated. I check IM here too if you want to contact me that way.