Most wigs will come with longer bangs, they just require a little trimming. I usually trim mine when I wear them (just be careful not to poke yourself in the eye with the scissors XD), that way you can see exactly how and where it all sits etc.
It depends also if you want the manga black or the anime blue-toned wig? Mine is black as I based mine off the manga version ^__^
I can't access my eBay atm, but when I can I will ind the link to the one I bought if you like :3 it come as long as in this pic and this one isn't rrimmed at all. But in the bewer AnE pics I uploaded I trimmed all of it xD
Since the anime was released I've found it much easier to find references, so many to choose from. I had one page I based my first one off XD the chapter training in the woods~ There was only about 11-12 chapters when I first cosplayed him~ I still haven't seen the anime though, GAH I wish I had the time to!!