Audi A6 Avant 7 seat conversion

[ThreesixtyM]

Hi all. Having just purchased a 2003 A6 Avant 2.5TDI I was wondering if someone could point me in the direction of a specialist who could put a 3rd row of seats into the boot area? I know that it is possible to fit extra seats but haven't had any luck in finding someone to retro-fit them. Many thanks