http://www.buellxb.com/Buell-XB-Foru.../back-to-stock
Ask this guy. If I was you though I'd just get a normal round headlight from an sv650 or something similar. Most of the 'streetfighter' headlights you see on ebay aren't even worth putting on a bike unless you just plan to stunt it and don't want to get pulled over for not having a headlight.