The way I see it UV map switching like this... beyond the scope of legacy figures... probably needs to be handled by a script... on similar principles to the wardrobe wizard one, I guess...

As I understand it, Who3d is working on a UV map switching script. He has a thread going here about it. I think the originally intended scope of it may have been Genesis in Poser perhaps... but, even if I'm right in that... it surely has broader applications.

In any case, automated, user-side UV switching is apparently something that is provisionally feasible...? So I'd say don't get caught up in that yourself.

I'd say, effort would probably be better spent creating a realistic range of merchant resource, hi res skin texture creation kits, with a range real-world skin types on the menu, to make it easy for a range of character creators to create Lucas character packs?

Cheers