Just looking around on google there are many websites that sell Japanese WWII items. Id try contacting one and seeing if they can help you out, they may even be interested in buying.
“Let it not be said that no one cared, that no one objected once it’s realized that our liberties and wealth are in jeopardy.”
"He who passively accepts evil is as much involved in it as he who helps to perpetuate it."
---Dr. Martin Luther King
"If you think we are free today, you know nothing about tyranny and even less about freedom."