So, after you select color/capacity, and engraving options and then put it in your cart, the default selection is for 2 week shipping. There is a second radio button that allows you to select for in store pick-up. Once you click this you enter your zip code and it shows all the nearby stores and next to each will either say "in stock", or "not available for pick-up". You can do this both on the Apple store online, or using the Apple Store App. If you are not seeing the option for in store pick-up then I'm not sure what is wrong for you. I think you said you were in Canada, so maybe it doesn't work for the Canadian Apple Store.