Howdy andrew,
sorry it took me so long to read your post, but I notice you didnt rule out card models. So, let me give you a few links and tell you abit about them.
http://www.daf.com/ once on page, look for "DAF FUN" header, scroll down to "paper models" and click for this truck, the DAF A2000 1959 . (it should be close to the scale you are wanting, if not it can be "rescaled").
Try this link:
http://www.spacestation42.com/pt-trucks.html for older cars like this:
If those are not what you want, try these links:
http://www.spacestation42.com/pt-cars.html about 100 links to paper cars.
http://www.spacestation42.com/pt-trucks.html about 100 links to paper trucks and other larger vehicles like construction equip.
http://www.spacestation42.com/pt-motorcycle.html motorcycles and military models
You should be able to find something in all of these links.
I hope these help,
Have a good day,
greg aka GW