Thanks to the post by mpennock:
http://leadadventureforum.com/index.php?topic=36502.0 I finally got around to ordering a Lasalle Armored Car from Shapeways (photo below).
Being a 3-D printer-generated model, it amazingly came in only two pieces -- the car itself, complete with axles and wheels, and the turret with attached MG.
It's very lightweight, but the walls are thick enough to not be fragile, and hollow! No mold lines. No flash. No bubbles. No overcast. Nothing to clean up! Not sure whether I should wash before priming though.
The model comes with either surface polished or as is. I chose as is to save a few dollars. The surface is slightly pebbled, but not so much that primer and a coat of paint shouldn't fill.
Detail is very good. Highly recommended. (I'll have to add rivet detail though.)
BTW -- Shapeways built and delivered in 9 days.