Warlord Games took their AA weaponry and put it on a truck (well, the historical armies did it first, but WG made it into a fig).
From the update:
Last week we released the early/mid war version of the ubiquitous Bofors AA gun. Now we’re making this classic weapon more mobile as we mount it on the Morris C9/B tractor. This combination saw widespread use in the armies of His Masty’s British Commonwealth.