I'm not sure if they still plan on ever letting regular tourists in there. -
The sticker reminded me of a tour I took of the Montreal Forum before it closed and the hockey team moved to a new arena. At one point the guide was answering questions and had her back to me just as I noticed an open door to a utility type room. I whisked in like an invisible breeze and procured some items from the floor and put them in my pocket and whisked back out unnoticed. I got a couple of small number stickers, lol. Still have them 18 years later.