According to
http://everquest.allakhazam.com/db/quest.html?quest=111 and also the p99 wiki (which seems to have copied the info from this link) the Barnacle Breastplate requires one Shark Skin (Lore) (
http://everquest.allakhazam.com/db/item.html?item=49206) and three Baby Shark Remains.
I just completed the quest and the combine would NOT work with the lore shark skin, but did work with a not lore stackable shark skin.