There is a guy on facebook who codes a lot of VAG keys and will travel when he has the right numbers to make it worth while. I'm sure he did a bunch of keys for Audi owners on here at one of the annual meets, even doing some advanced keys and 'Bentley Style' keys. His name escapes me at the moment.
EDIT: It's Craig Nettleton
http://forum.a8parts.co.uk/showthread.php?t=10032