Factory line has tabs so it's easier not to rotate when tightening and classic tube in lancaster ny will probably have whatever your looking for
https://classictube.com/?gclid=Cj0KCQjwj5mpBhDJARIsAOVjBdobO_OWElHuHOnmAlPgf76G12OC-pI5WZ8bCB7aR0-G9VNiMimdE20aAilNEALw_wcB