I can also make 800K disks (System 6 and slimmed down 7, and probably a full 7 install with multiple) which the Classic can boot from - Just let me know if you need any.
It's a stupidly complicated process, as I need to download the files, load them onto a USB, put those files onto a Zip disk from my iMac G3, put the Zip into my Plus (with a SCSI Zip drive), then write the files to a Floppy disk.
Quite a process, but it does work!