I found a way to make Mac disks from Windows XP
The way suggested by Paralel worked for me if I initialized a floppy with Mac and used RaWrite to write a .dsk image of the System 7.0 Disk Tools floppy I found on the internet. Even though the disk is useless so far to me, it means I've got a head start on something. If I can get all of my System 7.5.3 images that are in .smi format in a .dsk format, then I should be able to create the floppies from XP. Any ideas?