I've been treasure hunting in the hopes of getting a few pieces of this item for a while now, but I'm unsure as to which map (if there even is a specific one) has a chance of containing this item. I've heard mixed reports of what type of map drops this item: xivdb states that it's a drop from Goatskin Maps, but I've also heard of people getting them from Leather and Boarskin Maps.

So is it just a general rare drop from treasure hunting, or do certain maps have a higher chance of dropping it?