I am looking for 2004-2006 Audi A8 Navigation screen motor.

I have a problem, when I start the car, Navigation screen opens but not fully and make weird cracking noise. I was told that I have to replace the whole screen unit with motor.

If someone can help me with this problem, please email me.
If not, maybe someone can sell me this part. New or rebuilt - doesn't matter as long as the price is resonable.

Thank you.