Bastion Explorer Maps from Piglin Bartering

Just as the cartographer has ocean and woodland explorer maps, the Piglin could rarely drop a bastion explorer map from bartering. It would probably make sense to make this the rarest or one among the rarest of the Piglin's bartering drops. Getting this map from bartering rather than from a cartographer or some such mechanic would make a lot more sense as it would keep the Nether contained in its own world and also tie Piglins even more closely to the Bastion structure.