I wouldn't go looking for the OEM's, most people got rid of them since they don't last. I would say you would be better off going with the new Conti DWS like some of us have. I used them at the track during CAA and loved them and a few of us used them at the last Dragon with no problems.

They are not as expensive as others and you can check them out on TireRack and you'll see they are getting top reviews...at least the last time I checked. You may find you want the full set and use the rears you have now until they are spent.