A Webcor (Webster-Chicago) wire spool ?

Good idea: many available on ebay.

My father had a Webcor wire recorder…

73, Jacques, VE2JFE in Montreal

Interesting device. I never heard of it before now..  So the operator had to crank that wheel while copying code?

Maybe you can find a spool of recording wire that was used on the precursor of the tape recorder.?

I also noticed that the magnets are arranged in opposition (S-S) . I don't this will "write" a "direction" of the domains as much as N-S arrangement might.?