Anyone know where to get the lower plastic trim piece that "finishes" the bottom of the rear bumper (saloon model)? I backed over a hidden tree stump, and ripped mine off! Fortunately no damage to the main bumper itself. Audi says it is not a separate piece. Well six screws says it is! Unfortunately that means Audi doesn't sell it separately, which means £200 for new rear bumper plus painting and fitting! It's only a 20 quid strip of grey plastic, about 4 inches high by about 4 foot wide. Part number is 4B5 807 379 N. Thanks.