Needed some seat covers for my 68 A-100 . Legendary Interiors has a custom option. They took the 64 Dart GT design and made it into the A-100 pattern ,came out great. They ave all kind of options on there site under the custom tab. Probably not a lot of wagon seat covers there but you might have a seat out of something else that maybe they could help with.
I love A 100's Had one the E fell off the front so we called it the DOG. King pins can be scary to speed !