A throwaway printer is probably your best practical option. Other than that, using a vintage dot-matrix printer with a low enough resolution (e.g. a 9-pin head

A throwaway printer is probably your best practical option. Other than that, using a vintage dot-matrix printer with a low enough resolution (e.g. a 9-pin head) that it's unlikely to have either the smarts or the resolution needed to make this work. Of course, this just means that if you are conspicuously buying a curated collection of vintage printers, you're providing another type of evidence.