I don't think anybody sells them now. It's a pretty simple procedure to put a groove in an existing one with a cutoff wheel on a Dremel tool. It doesn't need to be deep, or precise. Ditto for relieving the pushrod cup in the lifter to allow air to escape from the body- - - - -a shallow cut to allow a tiny seep leak is all that's needed. Smith Brothers can build just about anything you want from scratch.

www.pushrods.net/

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!