18 years?!?!! I really hope you find one soon! I am not sure what the rules are regarding where to get referrals from in Canada but I would just search one on Google and see which one has the most positive reviews- that is what I always do anyway. Or maybe your primary doctor can refer you to a good one, that is pretty common nowadays. Or maybe you can see your surgeon? A lot of people tend to do that too.
Hope everything works out