I came across this image as I was doing other research. It's a painting from the Canadian War Museum's collection, painted by William Ogilvie at Dittaino, Sicily during Operation Husky.
So of course I needed one! I took a jeep from a previous project, and constructed a superstructure from styrene rods and a stretcher from brass rods and green stuff. Some figures were easily converted into casualties.
A dab of paint, et voilà! A jeep ambulance, with a couple of nurses from Perry Miniatures' "Lukewarm in Cairo" set: