Phatnoise in a new S3

[thebears]

I have a MY07 S3 with Sympthony head unit. As part of the deal my dealer was to install the phatbox in the car. He is now claiming it can not be done. I searched a few and seen various posts i think relating to the Chorus unit in the A3 MY07

Can some one help with the install and parts required if at all it is possible.

Thanks

 

[Crisis]

As far as I know Audi are discontinuing the unit, or have already done so.