Okay, I googled pictures of Kaoru Niikura.
Yep, I think you can pull him off quite well. I usually buy wigs off of ebay. If you can't find exactly what you're looking for, then maybe you'll have to buy a similar wig and then style it on your own. You could find tips on styling wigs on cosplay.com.
Anyway, since it sounds like you need a different cosplay in the meantime, how about cosplaying random visual kei / jrock / gothic / punk type stuff since it seems like that's what you're into..? As in dress randomly but look cool doing it. XD
I'll list a few anime characters that come to mind as well...
- DNAngel characters (if you have a red, blue, or purple wig, you can be Daisuke, Satoshi, or Dark respectively because their clothes aren't always consistent so you can put it together in your own way as long as you follow their styles)
- and uh....for some reason that's all I could come up with right now...
