Western Gun Parts, Elwood Epps, Calgary Shooting Center, MilArm, etc. There are quite a few places that should have them. Is there a local shop, not a box store, that has a smith in it?
I got all my stuff for the 10/22 build from brownells might as well do the extractor while your in there there's a combo kit you can order for both and it will ship across the border if you can't find/don't want to go to the store. http://www.brownells.com/rifle-parts...prod44322.aspx
It's super easy to do the 10/22 fixes no need for a gunsmith there pretty forgiving and with the parts being not costly it's easy to get carried away and do a lot of upgrades to them. https://youtu.be/cw6KbM7CjFM