Called Apple and asked if I could get replacements screws for one of my hdd carriers. Since I have AppleCare, the Apple rep on the phone assured me that since they don't have replacement screws separately to give me that they'll just replace my whole hdd carrier. Once I arrived at the Apple store to pick up my hdd carrier as AppleCare instructed me to, the part was there and for a moment I was pleased. As soon as they brought the part, I gave them my old hdd carrier but to my surprise I was told that the hdd carrier is not covered by AppleCare. At that point I asked if I could just purchase the screws and keep my original carrier but they could not do that so I ended up buying the carrier since I needed the drive bay filled. They ended keeping my old carrier even though I had to pay for a new one. Lesson to be learned, just because AppleCare assured me that it was covered, it was not the case once I picked up the part at the store. just wondering if anyone has had to do this. Looks like i'll have to find a place that has these screws. On a side note, the Apple Genius kept insisting that I should not be touching any parts inside the computer but I kept telling them that it is not a Mac Book Pro that we're talking about here but a Mac Pro desktop that has User Serviceable parts.. A little disappointed I have to admit.