Oh wow, I just realized: The stock sculpts for this tribe are literally the first and third figures (though plastic). The exact same ones. The unique is supposed to be a tribesman who "Got civilization" and became a mercenary captain, but it was sculpted much later by a very poor sculptor (which is why I'm trying to replace him).
Might get the third and see if I can mount his head on a body with better gear.
That's an incredible find... thanks guys!