If the eBay source sells out, this source also carries the same wig for $30 +shipping (and even suggests using the auburn version as a Space Magenta wig and shows it fluffed out, minus white strips):
www.amphigory.com/wigs_bad_girl.html
I've never used this seller, but they were mentioned a while back as a source for this wig (I believe it was on the LJ costuming page).