Anyone have any idea where one could acquire the original SHO KOSUGI (SK) NINJA SWORD? It was produced by Kosugi's company, Ninja Enterprises during the 1980s and is very hard to come by nowadays. It differs from the typical new ninja swords that are commonplace on the market now in a few ways:

-The blade is very short, shiny, unsharpened and is made of metal alloy
-The handle has a removable cap with a spike protruding from it
-The tip of the scabbard is a removable dagger
-The scabbard also houses a breathing tube

If anyone knows anything about it, Id love to hear from you! I am also interested in 80s era Ninja swords other than the "SK."