Love your private army, Gary. The short guy does look like a candidate for a Jeep driver, hopefully it works and you can post info about his heritage.
I was able to pull the head off my mystery figure and push the second head from my medic on the torso. Not a perfect fit since they were made by different companies, but it stays in place. The medic came with two different heads and they are molded with a much shorter neck than the mystery figure. Although not much of an improvement, it did take the bump out of the canvass roof. Still hoping for your shorty.
Reinhard