Restoring ancient zip file spanning floppy disks: pkzipfix equivalents?

I had some partial success and was able to get some files out of the archive. First, I created an "fd" directory to mount those floppy images, then for each floppy image, I did the following:

sudo mount -o loop floppyxx.img fd
cat fd/myzip.zip >> combined.zip
sudo umount fd

Once I had a combined archive, I did this:

unzip -FF combined.zip

There are fewer files I was able to extract than I'd hoped. I'm still open for seeing if there's a more effective method of repairing a multi-disk zip archive.