Optima Redtop
 

Is there any online canadian sites to purchase these?

i dont know...but most wal marts now keep them in stock

Performance Improvements and Costcos have them as well, I got mine at Performance imporvements since it was a special order for a reveresed terminal battery (but those are not online locations, sorry). You can check out there site for a location, that is what I did while looking for a battery.