I don’t know about Ontario, but there’s this breeder in Moncton, NB called SNS Tortoises if you can’t find anyone in ON. They ship almost anywhere in Canada and C&C has a positive review on their website https://www.snstortoises.com/
They didn’t have any available when I was searching last year, but the gentleman I dealt with was very nice and helpful even though I wasn’t able to buy from him at that time, Good luck with your search!