Ok, first of all, I LOVE MAGICAL DROP III!!!
I wanted to make World my 1st cosplay, and I was going to tear up my aquamarine silk sheets to do it, but my mom found out what i was planning and hid them on me! I haven't seen them since! haha! So i ended up not cosplaying untill the next year, where I went as Meroko from Full Moon Wo Sagashite...but i dyed my hair pink for that cosplay... ANYWAYS, have you tried eBay? I've gotten a LOT of my most amazing wigs off of there.
Just make sure to check out the fiber info on the wig to make sure its a good nuff quality, and the sellers reputation to make sure ur buying from a honnest person
So far, i've only had good eBay experiances to talk about!