Amazon? Not sure if they would ship batteries to Canada.
Amazon search

As you can see there are choices. Relion and Lifeblue also have some nice offerings. The Lifeblue can be purchased in larger sizes rather than buying multiple batteries. They also have a built in BMS with bluetooth so you can geek out on what your individual cell voltages are. I would give the manufacturers a call and ask about Canadian distribution.

Lifeblue

You could call Solacity Ltd

Found these on KIJI Alberta.

https://www.kijiji.ca/v-view-details.html?adId=1424572895&siteLocale=en_CA&requestSource=b

Not about these price seem right I picked used Chey Volt battery's from eBay while I was I Yuma .

https://m.youtube.com/watch?v=gHFpnOBQHOY&t=57s

All good answers to check out thank you guys!

Hi, here is an email I got back from BB

Grant,

We have couple companies that you could try for our batteries:
Ray Outfitted 353 Hurontario Street Collingwood Ontario (Canada) L9Y2M5 Raynor Vickers 705-796-7556 infoatvandmdotca
Volts / 6140581 Canada Inc. 4490 Ave Des Industries Laval Quebec,Canada H7C 1A2 Sebastien Caron 450-973-4770 scaronatvoltsdotca
Solacity Inc. 825 Van Buren St Kemptville ON K0G 1J0 Rob Beckers 613-686-4618 infoatsolacitydotcom


Thanks,
Jesse

https://www.cdnrg.com/ All Canadian

Hey that where I pick up my solar form. Solacity Inc.p

Have you tried emailing Battleborn batteries to ask how to buy their batteries in Canada. I found them very responsive when I emailed them questions.