I just googled cosplay wigs until something affordable came up. They don't have the line that my sister and I purchased from anymore, but as far as wigs go, their remaining line is pretty . . . not too bad, price wise.
http://cosplay.com/Ordering was pretty hassle free, and they shipped pretty quickly.
As far as quality goes, I don't know much about wigs, because I've only ever purchased one, but it held up really well, and I was able to comb it every night with no problem. The hairs didn't fall out, and they looked perfect every day.
I believe they're heat styleable, up to 420 degrees.
That's about all I can contribute.
Hope that helped, somewhat.