Measure the diameter of the flange and get a speedi-sleeve for it. Most bearing supply places can provide a thin stainless repair sleeve to cover the groove, and the same size seal can be used. Always install a new seal whenever the relationship is disturbed.
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!