Sorry, that's an image from Tripod so we can't see it. Though I'm pretty sure I know what you're talking about. His huge cloak with the swirling blue pattern on the back? I've seen people make that version if you want to search the costume pages here to see what they did. Personally, I did the anime version, which doesn't have the pattern like the art version.
Or.... are you talking about his main jacket, the one he wears most of the time, with the tails and the clasps that hold the flap? I have a bunch of pictures of all his layers if you want.
Cosplays in rotation for 2012: Kuranosuke, Ittoki, Fakir, Sokka, Rose, Rogue, Pirate UK, Shouma, Okita, Lia D'Beaumont, Belgium
Planned: Tira Misu - Sorcerer Hunters, Kokonoe - BlazBlue
Possibles: Tifa; Natsume; UK; Asch; Hino Kahoko; Wolfram, Princess Tamina - Prince of Persia