There are programs available that can restore a disk's integrity after a partition has been erased. Contrary to popular belief, repartitioning a drive makes it extremely easy to recover an entire hard drive, including previously deleted files.
I don't believe for a second that all of the documents and copies are missing. If they have been destroyed, that would mean that somebody who is very, very knowledgable did it. I would think that at the very least Curt Weldon has copies of some of the documents.