I have a Brother P-touch label maker, model PT-D210, that accepts label tape in 1/4, 3/8 and 1/2 inch widths and three font sizes. The tape is available in a wide variety of colors for both the tape and the print. Maybe either white or black print on either black or matte-gray tape would work? Or if you have a Jadis amp, black on gold would be a nice touch. Cutting out the little labels would be a bit fiddly but you’d have to do it only once.
https://bit.ly/30T79r4
https://bit.ly/30T79r4