I don't know how important these files would be to you, but there are pro data recovery shops out there. My Phd friend needed to use them.. cost $700 but recovered months of work.
http://www.essentialrecovery.com/
Something like this.. they can do crazy forensic stuff on even faint traces of data.
oh and for these guys to effectively do their jobs, it's best to avoid messing with the disk after data loss
