There is a new old stock Rochester B needle and seat on Ebay right now, part number 7002359 for $14.95 with free shipping. search "Rochester needle and seat" and it's about 20 items down from the top of the listing. It's an original equipment metal to metal type.
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!