I found some good made in Canada pulleys on ebay from a seller called: electricmotorsite
The first ones I tried were Browning pulleys from MSC. They were of extremely poor quality.
Just make sure of the size. The original motors are metric. Some people might have an opinion on whether a 5/8 shaft is big enough. I don't know enough to say but the new motors I got have a 7/8 shaft.