Ehm.. I have no experience whatsoever with cosworx wigs but.. I'm thinking that a Long Scruffy could work if you're willing to do a bit of styling. It would probabaly just need to be spiked up a little like his style hair. And perhaps trimmed.
There's probably people here who could help you/give suggestions better than mine, though. ^^;
ᶜᵒˢᵖˡᵃʸ ᵖʳᵒᵍʳᵉˢˢ ᵇˡᵒᵍ:: (soon)