https://www.repairtoolbox.com/wordrepair.html - Word Repair Toolbox for example is worth a try since the demo can let you see the possible results.
I must ask though, because I'm the curious type, why not backup such things on diskette or CDR? Even "expensive" USB CDRW drives are found for 50USD and a CDR is less than 1 dollar. Recovery costs much more so I always want to know what is keeping people from having what they can't lose on some backup.