Canada Ammo was the only place I found that had stock last month, but now sold out. Try contacting them to see if they have more on the way. If you plan to shoot any amount of 7.65 (.30) Luger, you may want to consider reloading, as factory ammo can be expensive at more than a buck a round.
Should you choose to roll your own, you can find Starline .30 Luger brass in Canada here; http: //www.rustywood.ca/starline.html