The marketeers used to sell it, but they closed i believe. I believe the only way to get it now is special packs or a TSA. But i doubt you can buy one from a TSA.
and some other people, but I wont name names, who wants other people knowing they have it has posted in this thread: http://forum.toribash.com/showthread.php?t=236877
lucent has a pure pack, for the void its unknown so far