Older Anime Expo Box Set Avaliability?

I've noticed that most of the special doujin box sets(specifically Meme50 box and Koume Keito Box) have been in the store for a while and have been readily available for some time now. A while back I was under the impression that there was a limited quantity for all of them. Was there just so much more stock left over or are they being reprinted? If its a reprint is there a chance we might see Saitom Box available again at some point as well?