First thing: do NOT install any software and do NOT save any files, until after you get back what you need. Once the computer has dropped the address for a file, that "space" can now be used to save a file.

Next: is the paper in Windows? If so, did you have the "always create a backup" clicked? That will make it easier, perhaps.

http://support.microsoft.com/kb/827099

Beyond that, all I could find using Google suggests a techie will have the software you need to pull back the file.

Hope this helps!