I came across this site a couple of weeks ago. They are located in the GTA but I know nothing of them.
http://gunheaven.com/index.php?main_...a0j14ab6n48127
Also shipping from London ON:
http://fcsurplus.ca/shopping/shopdis...%20Accessories
If we're doing the prove you're 18 then check
http://www.mopicairsoft.ca/AEG_s.html
Again I came across this a few weeks ago but i don't know much about them other than canadian.
http://customimportscanada.ca/index.php?cPath=21