There are so many ladies that work in Toronto I don't know of anyone that would turn away a gent that is between the ages of 45-50. If you provide a little more information of what you are looking for then perhaps someone might be willing to provide some information but it's so hard to offer a few names when your request is so broad.
Are you looking for an incall or outcall?
Longer or shorter engagement?
Downtown Toronto or one of the surrounding areas? (Markham, Richmond Hill, Mississauga, etc.)
Independent or Agency?
Approx. age, and/or description?
What is most important to you in a date? Service, looks or something else...