Here's an Ice Cream Truck/Van. Designed primarily for Gaslands (and 1/64 scale), but could easily be resized for Zombie Apocalypse games like Last Days or Walking Dead.
I haven't included the wheels, there are plenty of good wheel STL's available, should take anything around 12mm.
I'd love to see your makes if you print one.
Designed in Sketchup. It can be difficult to do fine detail in Sketchup, so this is designed in a larger scale, reduce to about 9-10% of original size in your slicer for Gaslands.
Prints without supports!
Wargamer and 3d Printer