WTB - 1980-90 OCC Rear Bumper Fillers

I am looking for all three fillers (20512952, 20512953, 202982600). I've found a RH NOS on eBay but not the LH or Center. I was also wondering what luck anyone has had with the Replica Plastics or Accutrim replicas. How is their fit and finish, how hard are they to fit and paint. I would love to find all three NOS but that is probably a pipe dream.

Thanks,
Steve