Thank you but, I looked there, today. I have that same catalog in print. It lists 55-59 but, not '54. That's why I'm asking here. The best sourse I know of
Give them a call - sometimes their catalogs don't show everything. Ask for dimensions. They may be the same size as a 54. Also try Crpenter
Don’t be stuck on our brand our it’s venders. Look to places like McMasterCarr by googling. I bought my wiper blades from Danchuk 55-57 Chevrolet supplier. Everyone used Trico or Anco. Remember all manufacturers shared suppliers of what was available. My sons 57 Pontiac rear end has E brake parts from my 56 Ford, Bendix was a big supplier.
Restoration Specialties may have them, agree on looking by the size, they are industry standard plugs.