Since you've already got it off, and I don't have access to ETKA to get part numbers, can you see if there's a part number on the silver surround of the center lower grill in the front bumper cover? Not sure when/where mine went missing, but the new one is going to be plasti-welded into place :|

If not, I'm going to get reamed for a full center grill with surround, probably to the tune of $400+ knowing how RS6 parts pricing works...

Thanks
O_E