SPS in Canada? The ones that McCalls sells are not the regulation SPS, and Leah_s told me that some of my fellow Canucks have found them up here.
Try L & M Bakery Supply in Toronto. 1-800-465-7361. I ordered mine by talking to someone directly as they don't send out catalogues to non businesses. They also have a minimum order requirement so I bought 2 sets - one for round and one for square. Good luck! I absolutely love SPS now!