You'd need to go through HLJ or Amiami.com. The currently available figures are running about 80USD before shipping at the current exchange rates. To get some of the older ones I imagine eBay Japan would be the best bet, though you may pick one up on eBay Amerika.
I've got tons of that kind of shit, I saw the novelty value, too. No clue how to get rid of it. *shakes head*