Asclepiad growers in canada?

Hi,

I'm looking for people, in Canada, interested by succulent plants in the Asclepiadiaceae family (Apocynaceae now?), such as Stapelia, Huernia, Tromotriche, Orbea , etc. If any is involved in such collection, please let it me know Trading partnets would be welcome, since it seems harder to find people growing those in Canada than cpers in the same country!