Anyone know of an independant mechanic/garage who can diagnose and repair Volvo systems as in title?

My wife's stereo (or Infotainment system as they call it) is not working, which has a knock on affect on the sat-nav, multimedia system and parking sensors.

The stealers decided it was the ICM which they kindly replaced for 1500, but then discovered (guessed is what I would call it) that the CD and Mini-disc drives are also faulty, so they want another 1500 to replace them.

I dont trust them one bit, and the fact they charge 90+ an hour is downright robbery.

So I would appreciate it if anyone has any contacts.