TooBusy has it right(ish). Bumper paint used to have a flex additive mixed into the paint to reduce cracking from light impacts. I'm not sure if body shops would blend that onto the body panels or not. Today that may not be the case. I don't know. However, My 2015 Ford Escape bumpers are different from the rest of the car, right from the factory. They are supposed to be the same color but are slightly "off" I could look down the row of Escapes and see it on every car not matter what color they were. So if being just a bit "off" is OK by you, don't worry too much about it. Have the body shop just paint the "2009" bumper cover to the color code and move on.
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Chuck.
“Any suspension will work if you don’t let it.” - Colin Chapman
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