Space friendly spool holder that hangs from a shelfing unit or it can hang from a line/cable. I include all the freecad files in case you want to edit or modify to meet your needs.

You need:

An M8 bolt and three nuts, one for the conector peice and two that lock together on the bolt.

A 6mm funiture screws (or something similar) that you should heat slightly to set in.

The nut inside the conector should be secured with hot clue with the bolt in place (you must remove the inner cilinder first as in just serves as print support).

See photos for reference.