Can anybody confirm if these are dropping?

http://psupedia.info/The_Magashi_Plan_(event_mission)

That says that 168 Bil De Melans are in the mission, I'm just not sure if we can find them yet, or of thats in a later part of the mission thats unlocked. I just figured since we have Bil De Vears in what we have already, that they should be there. Anyway, just wanted confirmation, since I haven't seen any in the market, though they might be over a stack anyway.