Of the possibilities I've considered: specialty o-rings (but the makers of those tell me that while they do make them for rotating shaft seals the rpm and temperature work against this application---one fellow thought you'd be replacing the seal every 1,000 miles or so),
The only concern I have with the speedi sleeve is whether the slinger lip can deprive seal of whatever amount of oil is needed to keep it cool. Hopefully it's unfounded.
