It's a lot simpler to machine a thin ring that fits behind the seal to space it out 1/8" or so. That puts the seal lip on an unworn part of the axle shaft. No point in spending a lot of money for special seals and/or sleeves that MIGHT work if you hold your mouth right!
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!