I got these ones from 18650batterystore.com for some one based in the US it is a great place to buy from. for canada, it ends up being a bit expensive with the shipping and exchange and duty at the boarder, but I had gotten ripped off a few times and luckily got my money back and wanted a north amaerican sourse. there is a chinese source that I am going to order from next time, I just have to look them up yet, but lots of people have had good luck with them for a while now but the shipping is obviously a lot longer. 18650 did treat me good though, I had one cell that was dammaged some where before it was shipped (just a slight dint and scratch) but when I stated I paid premuim money (at the time) for grade A undammaged cells, they agreed and sent me another cell to replace it. thats why there is 5 cells balancing.
you can order pretty much everything, the cells, bms, seperators, klapton tape and the case if they are in stock yet from 18650.