I can go to at least 5 different cemeteries in the Montreal area:
Mount Royal Cemetery
Sault-au-Récollet (Henri-Bourassa blvd, West of Papineau)
St-Leonard Cemetary (Lacordaire/Jarry)
If you have a family member burried at either of those and you do not have a lot number, I can look it up online at the cemetery's website or call the cemetery directly.
Always glad to help :)