HELP!! The plastic bumper extensions, rear in particular, are becoming very brittle and cracking on my Imperial's little younger sister, my '83 Cordoba. Now before you dismiss the fact that she's only a Cordoba, this would be of interest for all those with the early '80s Imperials, as eventually their plastic gradually dries out, cracks, chips off, etc. I had a dime-sized piece come off this afternoon, and I'm deathly afraid to put any pressure on these at all, even when washing the car. I can see the beginning signs of cracks on the top of the extension next to the trunk. How can I preserve this to keep the cracking at bay? I've run the part numbers through PartsVoice.com, but no one has listed new ones (big surprise!) How could I find new ones? [BTW, I have the complete 1983 Mopar Parts Catalog if anyone needs numbers for anything.] That's going to be the hard part with our later Imperials/Cordobas, or any eighties-vintage American car, really - the plastic trim pieces will eventually deteriorate to the point that they can't be salvaged, and junked parts cars won't be any better. That era Imperials/Cordobas/Miradas were never particularly popular to begin with, and the survival ratio will unlikely warrant after-market suppliers making repro parts. It's all very discouraging that the plastic-y cars that many of us enjoy, won't be able to preserved as easily as our Exnerific and Engelicious models. Neal Herman 1959 Imperial Crown 4-door Southampton 1972 Buick Riviera 1983 Chrysler Cordoba