I've rocked these $18 tracker bars from Z1 enterprise
http://www.z1enterprises.com/ItemDetails.aspx?itemDescription=Handlebar+7%2f8%22+Black+Superbike+Bar&item=EM23-12571
on a couple of my bikes. Decent bar, great price. I got a set of Rentals on my KZ750 and they have a way better feel, but cost a lot more. I'll be picking up a second set of Rentals from my Triumph Scramber.