I got rear ended in my 4.8 and found through realoem.com the rear cover with parking sensor receivers for $380. Just did a quick search and the front is about the same (for the black portion). Rear needs about two hours to R&R and needs rivits for fender flares. Don't know about R&R for the front, but it's probably similar and you can search here to see if someones already posted instructions...

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