Actually, there may be a way, if you have not overwritten the data area on your disk with any new files. (and if you feel semi-ambitous)
You can download a trial program called Directory Snoop at Cnet.com. You can get it here...
http://download.com.com/redir?pid=10262 ... 62157.html
or alternatively, if the link doesn't work, you can search for it by going to Cnet and clicking downloads at the top of the screen and search for it.
I suggest this program only because it is the only one I am familiar with and I find it simple to use.
After installing the program you should click, in the select drive section (under the + icon), on the drive that stores your save files. The program will scan your drive and when it is finished you should see a directory pane on your left of the contents of your drive.
Any item that you see in *red* is a file that has been deleted. You can right click on a red item and attempt to recover it by selecting undelete, however, if any file or program has written any information to any part of the drive that stored your save file, it will be unrecoverable.
So you'll just need to navigate to your saves folder and give it a try...I hope it works for you.