Several years ago, I sprayed the cladding with matte black paint. Then again 2 years ago. So color match isn't important. I'm currently checking into urethane repair. The first shop (bumper specialty) refused to look at it because of my paint. Dr. Dent and Maaco said they'd look at it though....
$550 is too much for a new bumper. It's too high a percentage compared to the value of the vehicle.
$350 might also be for a used cosmetic piece though I might be forced to consider that route -- if unrepairable.