Many thanks to Ayako and @vipfanauctions!
VIPFanAuctions has several samurai costumes from 47 Ronin currently up for auction. The items were obtained from Universal. The highest bid is currently $550 for one of the costumes from Lord Kira’s samurai. It will be interesting to see if any of Keanu Reeve’s costumes or pieces of his costumes go on the auction block.
You can view them here.