Hi! I found many stores that sell the bars I can eat (Atkins Advantage) & they carry many of the other low carb or protein bars. Grocery stores with health sections are a good bet, like Dominion or Loblaws have quite a big variety. The BEST price I found on Advantage bars is currently at Hy & Zel's - only $1.99 a bar. 2nd best is Loblaws at $2.99. Watch out for health food stores - they can be as expensive as $3.50 there. I will not order them online, man, we'd pay way too much with the awful exchange! I'm noticing so many places that sell protein bars now! Even some larger convenience stores.
I'm in T.O, so there may be more stores to choose from - I don't know where you live. Good luck!