I installed ball joints and while disassembling passenger side hub, etc, I noticed a slight grove in the CV joint assemble the fits inside brake/bearing

hub. I was able to purchase new seal, but no one (so far) has been able to look up sleeve replacement. If you examine photo closely, CV joint appears to have had sleave installed some years back before I owned truck. You can see grove in sleeve due to wear. If you recognize part, please respond. THX