http://www.plan59.com/main.htm Interesting site, and not just wagons. It would be cool to decorate the whole house with vintage car art. Wait, my whole house is already decorated with vintage car art, and every available inch of shelf space has a 1/18 scale diecast car on it at my house.
Some of these sites have posters: http://www.oldgas.com/visit.htm And probably the Classified section here: http://www.oldgas.com/index.html I think there's some in some old posts in the Memorabilia section on the main page, and others in the Site Directory Links section.
Wow, some amazing pictures on that site. I love the 59' Mercury wagon. Here three pics I have on my HD...
