hmmm I will throw a site in the mix that may find you poly contacts in the immediate area. Ok 2...
OKC is a poly friendly site and there is a contingent in southern ontario
Fetlife - I know this is a bit from left field because it is a fetish site, but a lot of people identify as poly. Might be able to make contacts there. Fetlife is like facebook for the deviants in the world
Not traditional but it might help find people.