Check out this thread for Ouran cosplay info (jackets, ties, etc.).
FYI - there really isn't an easy
pattern. About all jacket patterns are advanced. There are some posts in that thread that point to where you can buy similar jackets instead if you wish.
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