Bicycletterie J.R. (J.R. Cyclery) stocks the B-17 and a few other models. They are located on Rachel Street, a few blocks East of Saint-Laurent Blvd. I am aware of a couple of other shops that would have no problem ordering them.

But if you have to do a special trip to Montréal just for that, I would suggest that you order from Wallingford in Louisiana. They have a very good return policy. No personal experience with them, but I know 2 persons who have good experience.