I just thought abot that since at that imagesize it's hard to make a difference between Leader and ordinary leadership if the pic is not totally different. And we can make promotions for all types of heros easily(hero, wizard, wizardlord etc.) without having to mess around with the gamefonts too much. Anyway I made a first attempt, can you try if it works? I don't know where you take the coordinates exactly though can you have a look at it in dxtbmp yourself?
The fist is for unbreakable and the winged sword for leadership. If it works I will polish them up a little.