I'm certain all of the body parts are still available through MBUSA, why don't you just bring it to a couple of body shops and get estimates...insist they use OEM parts only and submit the estimates to the guy's insurance company. Why would you be hunting down the parts for them? They can order the parts from any dealer.

I just checked and the rear quarters list for $515 each and the trunk lid is $320 You're probably looking at $3-4K for parts and labor to repair the rear damage assuming the unibody wasn't bent.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz