Johnstone Supply in Durham, or Grainger in Raleigh. Also any electric motor shop. What size do you need? If there is a salvage / junk (not cars) yard close by? Go and rob a unit from an old motor. When AO Smith made motors in Mebane, I used to go to salvage yard and pull off new caps and bearings from motors that didn't make it out the back door. They didn't fix anything. Once I picked up a 2.0 HP motor that was labeled "noisy." When I took it apart and removed the "nab wrapper", it was no longer noisy. You might check out a "trash pile" and rob cap off old washing machine. Some are located on motor, and others are in the control panel.