I can already tell you that it won't be possible to effectively add headgear to Barbarians. There are a couple reasons for this. Their heads are larger than the other classes, so scaling would be an issue. Their ears would also clip through the headgear. You'd also have to worry about editing the piece to work/disappear when you go into tiger form. I suppose you could make head fashion appear on Barbarians, but it wouldn't look very well.
if it can be done for venos why not barbs