https://www.northwestguitars.co.uk/set-of-3-2-large-1-small-volume-tone-knobs-for-fender-jazz-bass-guitar/
https://www.ebay.co.uk/itm/3pcs-6mm-Black-Jazz-Bass-Control-Knobs-For-Fender-Guitar-Split-Shaft-Pots/264340596899?hash=item3d8bed68a3:g:OVUAAOSw6Ulcy7on