It seems as though with the rise in the Monk job, it would be appropriate to present the idea to the development staff in even more ways to acquire the necessary items for the black belt quest.

Perhaps they could take existing Notorious Monsters that aren't camped anymore and add a blackbelt item to their agenda.

For example, Vrtra. No one even thinks about this wyrm anymore, but I bet people would if a Wyrm beard was among the drop pool. =)