There was an LFS in Ontario that was importing from Seahorse Corral. I'm not sure if he's still doing it - I'll try to figure out who that was. There is a minimum 100 pony order from Seahorse Corral, so it's not really retail-friendly.
You could try contacting Seahorse Canada who raise Erectus, and ask if they know a Canadian source for Dwarfs. Google it, they have a website, but I can't post a link to a non-supporting vendor. Reef Boutique in Toronto has a Facebook page with recent pics of Erectus too.
Maybe rayjay will reply soon, he knows the LFS.