I'm not sure how small you need it to be, but if you took an older regular cab half-ton with the shorter wheelbase (6' instead of 8' bed) and replaced the bed w

I'm not sure how small you need it to be, but if you took an older regular cab half-ton with the shorter wheelbase (6' instead of 8' bed) and replaced the bed with one of those fold-down-side beds, it'll be relatively compact. Or you could just rent a mule ;-)