Is there a repair facility you can strongly recommend?

Hi, I need to have my iPod Classic 160 GB repaired, and though you have a very excellent teardown how-to for numerous issues, I do have a 3-year Square Trade warranty so I would prefer to have someone do it who's a 'crack' expert (no pun intended) at repairing it.

Is there a business or facility in the Los Angeles area that you could strongly recommend or know of?

I believe the issue is the click-wheel as first it was not working on the forward button, now I can't even get into the Diagnostic Mode on it to verify/confirm if it is the click-wheel or possibly the hard drive. I can do very limited things with the click wheel.

The other thing is, I bought this new in December but only started using it in April, so there has not been heavy use on my part.