Raid out of sync; rebuild corrupted

Hello,

Evidently, while installing a new drive, I inadvertently disconnected one of my raid drives. I noticed the problem 2 days later and took it to the shop where it had been made and asked them to rebuild the raid. Sometime later they told me that the raid rebuild failed. Now all my .pst files, archived mail and bookmarks are seemingly lost. The good news is that they used the new (large drive) to do a reinstall of XP. The bad news is I can't find my old files. Any help with the dilemma would be appreciated. Thanks!