I was lightly bumped from behind yesterday. Luckily it didn't do any damage to the bumper because the other car was lower and his bumper missed mine. His front grill hit my bumper and chewed up a bit of the rubber shroud/ cover on the rear bumper. I am wondering how much of a big deal is this going to be to replace. Is the rubber part available seperate from the bumper or is it sold as one piece? ???