The guys from "Euskal turnover association" have produced (and are selling) the aforementioned "skill dice" (pics below).
Apparently they will be available for the world cup, and they cost 2€ each or 20€ the complete set (12).
For more info, please check on the NAF forum:
http://www.thenaf.net/index.php?name=PNphpBB2&file=viewtopic&t=5249
