I obtained my Smiths to Audi 016 from United Speedometer Service 2431 University Ave, Riverside California. Check out there web at
www.speedometershop.com
Contact Carl at 909-684-0292. Fax 909-684-0146
You will need a ratio adaptor. Their web site will provide information on how to calculate the ratio. They custom make the cables and ratio adaptors. Good people to work with.
Regards
Mike