Just found that website:
http://www.rocketfireworks.ca/smoke.html
You can get a box of 5 smoke grenades for 21$ or a box of 25 for 90$.
The only downside is that shipping is 40$ for canada, but the warehouse is in Toronto. So people of Toronto could buy some and sell them back with a more convenient shipping price. It can be sent via regular mail cause it's non explosive!! Check out the video!
http://lib.store.yahoo.net/lib/yhst-...oloursmoke.wmv