Riverfront Aquariums in Calgary will ship, as will Gold's (
www.cichlids.ca). Gold's is awesome, however their site isn't really updated anymore due to other commitments from the guy that's running it. Best bet is that you give them a email inquiring about what you're looking for. Gold's has really good prices as well.
Spencer Jack (
www.cichlaholic.ca) is another good one. Specializes in Cichlids. Very reasonable shipping rates. Have dealt with in the past.
And I've dealt with Ryan from MA before, very pleasant to deal with as mentioned.
Look up East Coast Aquarium Society(aquarium society based out east somewhere, NB I believe) on google and go to their forum. They have a list of vendors that they've had dealt with before with group orders. However it was a decently long list that I don't know off the top of my head.
Below water (who's also a sponsor here) is another, never dealt with. But have heard good things.
Those are all the Canadian based ones I know of. Another US one that ships is Toyin, I've asked before. However, unless you're after something rare that you can't get in Canada, I wouldn't bother. Cause shipping and customs alone will probably run you around $300 or so at least when I looked into it a couple years ago. Hope that helps!