But the workshop

Hey, guys.
With me soon the timing belt has to be changed
I had visited an Audi workshop in Solingen and they want 1800 €
have for the change and I'm not willing to pay the price
Here's my question to you where you take yours I'm looking for a workshop of my trust someone has a tip for me
As I said, one of you knows a good screwdriver shop from Solingen thanks for the answers in advance.
Greeting Werner