Rear Jounce Stop

My 1996 Dodge Caravan Sport rear jounce stops are toast. I assume they are round rubber (all I have is a metal base with ragged bits of rubber remaining) and retained by a bolt through center with a nut in cargo area just beneath the carpet. I have seen some on Dodge part websites but they appear to be pyramid in shape and not round. Anyone have any epaerience here and a source (other than dealer)?.

Well I have new jounce stops and it was not easy as my SE Sport carries HD suspension (not on the window sticker) and it took the dealer using my VIN and a call to DC parts to find out what type of jounce stops the car had (none of the dealer techs had ever seen the screw in type of stop). Just thught I would pass this along. Oh, the dealer comnputer readout/pictures do not even address the stops on my car.