I've managed to make it to Floor 15 at least 3-4 times since the Crownstar Addendum's excessive spawning was fixed, and have never found one since. I do believe that it was changed to include (special="1"), which would effectively make the item never spawn within the dungeon(Just like the magical badass jacket). I'm wondering if it is possible to even see this item in the game(seeing how it doesn't spawn in the dungeon). I'm also wondering if it's craftable or is a guaranteed spawn in a specific unique room, because if it is neither, then I would think that it's completely unobtainable. I was going to reply in the 1.0.10 Feedback thread about this(where the special="1" suggestion came from), but sadly it's locked.