Recommendations for authorized dealers for MBP HD upgrade

I recently purchased a used MPB and I like to upgrade the HD from 160GB to 320GB. I know apple doesn't do the upgrade after sale but, is there a authorized dealer who can do the upgrade for me?. The system is still under warranty and I do not want to void it by doing the upgrade myself.


I can't help too much with authorized dealers, but I replaced the hard drive in my 15" macbook pro. I put in a western digital 250gb drive. It was fairly simple, as long as you're comfortable with a lot of little parts. Here is link if you want to see how it is done: ent/85/8/