nyguy's link and http://www.suurland.com/ are the only places I found that have anything useful. Trust me. I was looking for blueprints for a 1963 Dodge Sweptline pickup. Even snail-mailed the Dodge HIstorical society in Detroit. All they had were promo photos.

After several days of searching, I ended up finding a low poly model (meant to be subdivided) for $400. I bought it, though I don't remember where.