Hello John,
Ontario marriages are available up to 1925 with a new year added each year. If they married after 1925 you would have to order a marriage certificate directly from the Province and explain why you are entitled to the same (pain, but that's what they do now)
I have to go to the library this week where marriages to 1925 are free to view and if no one has found something by then, I will take a look.
Karen