I'm from Pennsylvania, so I'm unfamiliar with the options available in Toronto. However, here's a link to a directory of BDSM organizations that seems to cover all of Canada. Although the directory is BDSM-oriented, you can see there are several organizations that appear to focus on spanking. Hope you find what you're looking for!
http://domsubfriends.com/cgi-local/w...BRecords&ww=on