How rare is the golden kanohi kaukau in bionicles?

well,they're found in the 2002 krana packs,which contained 3 krana(bohrok colored),and 2 kanohi(1 gold and 1 silver),so you probably have a 1:6 chance to get it.Basicly(spelling?),it's as rare as the other gold and silver masks in the krana packs.