I had mine fitted by
www.rac-london.co.uk.
I supplied all the parts including rear vent pipe work after
getting all the part numbers off the net.
I dont think you can get the non cd changer version in the uk anymore
it used to be supplied by Vagparts before they ceased trading.
From what i remember fitting was under £200 to fit it all
with working rear vents. I also had the front cup holder replaced with
the version with a sliding cover. The rear vents dont give out loads of air but
iam glad i had them connected up. Who wants dummy vents.