There is a freely distributed program called the A64 package that will do
what I think you need. I was never a 64/128 user so don't kill me if I'm
wrong. There is a source in that file for hardware that will let you hook
up your 5.25 drive and read the files off the disks. A64 appeared in the
Fish catalog and should be available here and on bbs's everywhere. Good
luck.