Also to add to my older response, read where I discuss the imbalance and inconsistency of just things in this game in general. Yes items like these do signify what people have done, but that's stuff that should be rewarded for doing something IN-GAME o/w should be available in the MS. Getting a free item at an event should not be exclusive, it's a free item and that's a great gift in itself. It's like if I had the option of paying even $40 for that hideous thing, the option is there. It means these people got a $40 item for free, it is a present and they still hold on to and cherish that memory.

Make new memories and release these items again or give us the option to get it at some point even at a ridiculous price.
I. Just. Don't. Like. Exclusives.
Above all, not even the prices.
If an item is still available, then at some point your dream of obtaining it can still happen.