You can find helmets on eBay, but for the rest of the suit you'd probably have to make it yourself (I wouldn't know where to begin with that, don't even ask).
Wow chill... I just kne that theres an auction for Toei too. I was watching a vid on Youtube where this guy gets his Kabuto belts off some Toei auction and it ahs the Clock up function on it as well while the normal ones just don't. Just type in Kabuto clock up system belt in Youtube or Toei Auction... there might be people taking vids at the auction etcs... I heard that at something Land, they sell ALL KR and old toys from any series...