"Hunchback" Amateur Rights?

I am on the Play Selection Committee for Theatre Sarnia - a volunteer-run, community theatre in South-Western Ontario, Canada. We are starting to plan our September 2018 - June 2019 season, and are very interested in considering " The Hunchback of Notre Dame" as either our opening musical (September 21st - 29th, 2018) or the closer (May 3rd - 11th, 2019). Can you let me know when the amateur rights might be available? Many thanks .