Strange, still got enough non trivial kill to get one yellow bub without any drops... most are on named which should not drop the molar but I killed probably around 20 other non named, non trivial kobold without a single drop... guess I'm unlucky but I'm definitely far from the 33% announced...
edit: ok, Magelo says that this only drop from the lower level kobold... no non named kobold in my range seems to drop it, only huntmaster furgrl and krode drops it, which I have killed respectively only three time and once for the second... guess that explains it and it also means that I won't be able to really use that quest axcept maybe once or twice from huntmaster dropped molars...
http://eq.magelo.com/item/1761