The jewelry mounts were from stock at Fire Mountain Gems online, although Amazon and many, many others carry such supplies. Earring hooks and hardware are also in the US at Michaels and other craft stores. A jewelry store might be able to do such work at a higher cost. Be sure you do not have an allergy to whatever metal(s) you choose.

Besides the hooks, you'll want small split rings and head pins to put through the design to fasten the floppies to the split rings. If you use split rings only, use a bit bigger diameter and you might have to size your hole in the floppy a bit bigger. Remember to ensure the hole is round or Gingerbread will not recognize it.

Going Further

As this design is in Affinity Designer 2, you are free to change it to your heart's content. A 3.5" floppy: sure. A hard disk: of course. It's only limited by your imagination.