Sorry I can't tell you where to get them in Canada, but what you need are spiral fluted cutters, prefereably tungsten carbide.
Thats a link to a catalogue page of the company I buy from in the UK (just to give you an idea what I mean).
You should use up cut spiral for chip clearance (routing channels etc). Made sure your hold down is good as the work piece may be inclined to lift due to the up spiral. Use down spiral for clean edge finishes.
You can also get these in ball nose cutters, good for carving etc.
Carbide spiral cutters arent cheap so I'd say buy what you need when you need it rather than buying a load and not using many of them.
The ones I use commonly are 1/8", 1/4, 3/8, 1/2" dia straights
I also use 1/8", 1/4 and 3/8 ball nose.
A V groover is useful for carving/engraving
Hope this helps