Finding a NOS part that was most recently installed on a 1954 engine might be a challenge. How about just flipping the ring gear you already have over? Unless teeth are missing, the back side will look like it's brand new.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!