I go to Concordia University currently however I live on the West Island. Anyways, concerning places to live I'm not reallty sure what you're looking for. You're best bet if you can't find rez is to find some roomates looking to rent out a room or something along those lines. Also, don't limit yourself to around the campus. I would say anywhere around a metro station or bus stop is fair game as there are stops pretty much inside the university or just outside its front doors. If i can help you with anything else just let me know in the thread or PM me.
Hope this helped a little