I'm not sure if it is still the case, but a few years ago lots of people had Eibach springs listed for the Q4, but when you enquired about them or tried to order them they came back saying they were out of stock.
I think it was a case of lots of people still listing the full Eibach catalog, but Eibach no longer making the Q4 springs.

Like I said that was a couple of years ago, so if you do get a reply and they do say they are available, please let us all know.

Cheers