I think the fact that the OP is in Montreal Canada is going to make a lot of our purchase suggestions moot. BikeIsland says they'll ship to the lower 48 states. Islabikes website makes no mention of Canada, either. In either case, it might be worth a call to confirm, if the OP's interest runs high in either direction.
OP, take a look at Norco bikes.
http://www.norco.com/
They have a nice range of sizes in various styles. A quick check of their website shows that some models, like
http://www.norco.com/bikes/city/urba...indie-4-forma/ come in XXS sizes.
This brand might be your ticket. Whether you can find your size in stock, well, that's another question. Looks like they have a good dealer network in your city.