I wanted to upgrade my 2005 A4 V6 3.0 to include Sirius satellite radio, I bought the trunk mounted tuner and had the dealer install it to the antenna and head-unit however my head-unit has apparently been replaced with a NON Satellite ready head unit, thus it does NOT work.

The dealer said I need 8E0 035 195 G. I think the “factory radio” in the car is 8E0 035 195 A

For the life of me I cannot find 8E0 035 195 G online anywhere, dealer states they can get it for $899, seemed a bit high....

Any ideas?