I bought one from a company in Florida a couple years ago. I paid about $175 I think. I liked the look of it on my car. It had 3M tape also and they did a very good paint job on it. Matches perfectly. I've driven 120mph+ and washed the car dozens of times and the spoiler hasn't moved or chipped one bit. good luck.

 

The lip spoiler is made from urethane (similar to the bumper covers) and is quite flexible. with the shape of the trunk you can install it with more or less curvage depending on how high you mount the center in relation to the ends. The shape of the A6 trunklid will alter the appearance.