New rotor, places that stock them are few and far between eBay has then for $64 bucks but probably are Chinese crap. NAPA might be able to get you a decent rotor though. Adding to the cost is a new wheel bearing and race, the right way to do things. With that in mind that's why I suggested calling couple machine shops if would take under an hour to do the job and have it back on the car same day. Both shops that I use would do it on bartering terms for a $24 case of Coors Light