I'm not an expert in Arda wigs, but just based on what I do know and what I know about the character, I would say the closest thing to Dean's hair that they've got is their 'Rocky' style (http://arda-wigs.com/products/rocky)
, since his hair is so short on the sides. The only other wig that I think gets anywhere close would be 'Jett' (http://arda-wigs.com/products/jett)
, but it's a lot longer on the sides and top than Dean's hair is, and I've learned from experience that cutting short wigs too much shorter can result in possible disaster. If someone else with more experience in Arda want to chime in, please, feel free.