As I recall, some of the utilities claimed capability to undelete a partition volume. If this could be done then presumably one would have access to the desired files.
In the past, I used a utility from Norton called some thing like Disk Recovery Manager. It allowed capability to view as well as modify data on HDDs and even floppys (in HEX, Octal or ASCII). This was good for manually repairing a partition table or capturing text (eg, capture source code or text from a letter or memo) right from the media storage device.
I would look carefully at the stuff on Raymonds to be sure. For example, PC Inspector says that it can locate partitions and recover the files even if the partition has been deleted.