Can anyone recommend a good mechanic based on the North Shore ?

Im fed up with these "big name" "trustworthy" stores that do the work at top dollar, and then pretty much refuse to accept any disputes about the work done because they cant replicate the issue in 2 minutes......

Had some shock work done recently, a 2nd hand part was used, and now Im 90% sure that part has failed (probably out of "warranty" period now as well) and Im back where I started, but the mechanic in question wont accept that its that part at fault - think theyre just too lazy to take the shock off again and check the part on the chance that Im correct and they cant get any money outta me....

Rather just find someone who will lsiten to what I have to say and give me a reasonably honest opinion...