So, the shaft was deeply grooved and someone installed a Speedi-Sleeve?
Looks like the shaft is 3.125" in diameter, so you would need a part #99306, 99307, or 99849, depending upon width needed and availability. 99849 is the most commonly available #. Those are SKF numbers. For National MOOG or Timken, replace the "99" in the part # with a "33".
ANY auto parts store or industrial "bearings and drives" place should be able to order you a sleeve, they are NOT cheap, probably $70 to $100.
Verify the measurements and part # BEFORE ordering as it MAY not be returnable if it doesn"t fit or there is not room for it inside the housing bore.