You can buy crepe hair at any party store that sells costuming. Since it's getting close to Halloween it's possible that the seasonal (read: much better) are open, but if not, your local Party Boy should have crepe hair. If worse comes to worse, go to a Joann's or a Michaels or a Hobby Lobby and buy fake fur and use that.
L, Death Note (100%) [premiered at Oni-Con '08]
In the works:
Kaoru, Ouran High School Host Club (98%) [premiered at Oni-Con '08]
Steampunk Costume, clothes (35%), equipment/props (45%) [most likely to premiere at Steam-Con San Antonio '09]
"I manned up and ate those damn wasabi balls!" "...You manned up and cried too."