I also have a No2 as well as a S&W M&P that I really enjoy shooting but 38S&W is both pricey and tough to find. I bought a box at SIR in Winnipeg this summer for about $21. Lebarons in Ontario also carries the stuff, usually at around $23/box.
Because of those prices, I also bought dies at SIR so I can reload it....someday....
I know this doesn't help you much as you're in AB but if you're desperate, you could always have it shipped ($$$!). Or perhaps you have a friend passing through MB or ON that could pick some up for you and bring it back.
Good luck. No2s are affordable, fun guns. Too bad they cost what they do to shoot.