Got mine from the Wolfsburg factory on a visit a couple of years ago.
The VAG "department store" in Berlin near the Brandenburg gate is well worth a look to buy everything VW related too. Got within 3 feet of a Veyron when they'd just come out, but no closer! Lots of security willing to step in if you got too close. Got to sit in a few Bentleys too. VW would've had that Veyron paid for in a month if they were prepared to let people sit in it for a pic with a 20 Euro fee.
Puzzling why Audi got its own separate building down the road when VW, Lambo, Seat, Skoda, Bentley and Bugatti were all in the same building.
Might pay Berlin a visit in the Summer and pick up a few things that are either impossible to get over here, or are extortionate.