:D I am looking for a set of bumpers in as mint condition as possible.
As of about 2 years ago, they were available NOS from GM. I replaced both the front and rear center bars on my '91. It was cheaper and far more convenient than rechroming. The front bumper bar is the same from the early '80's to 1992. The rear center bar is exclusive to 1990-92 to accommodate the revised bumper ends/tail lights.
Passenger front bumper ends have been sold out for some time. The driver's side was still available then.
I bought a rear bumper center bar for my 91 Fleetwood from Parts.com.It was $190+shipping.The guy told me it was brand new from Keystone.The fit was pretty good.I'm happy