That felt washer is "nice to have but not really necessary"- - - -or you can make your own from a sheet of wool felt with an X-Acto knife if you really want it to be there. So far as the lip seal goes, just measure the yoke and the housing, and use a progressive size chart from any of the seal manufacturers to pick out the right size and design of seal. That's how I chose the lip seal I use to replace the rear main bearing seal on a stovebolt engine.
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!