For the jacket, check out places like the Salvation Army or Goodwill. They often have men's jackets in colors that are perfect for cosplay. I know I've gotten two "Ouran" jackets from my local goodwill store (for two different cosplayers.) It's much cheeper (I don't think I paid much more than $10 for both) and easier than trying to make one or buying it from a cosplay supplier.
Dealers at con usually sell the patch if you can't find it online before hand.
Scruffy from cosworx is a very versitile, short wig depending on who you are trying for. Also, professionalonly on ebay has quality stuff and have always been good to me.
Genjyo Sanzo: Saiyuki Reload
Revy: Black Lagoon
Rin Tohsaka: Fate/Stay Night