Hi there.....I live in Montreal, but there are some questions that would have to be answered first, to see if I would be able to do this for you.

Since I have 5 cats and 1 dog, would your cat be able to withstand being in a closed room all day and night with access to a window. Mind you, at night he/she would have me as a companion.
How old is your cat? Has he/she been fixed? How long will you be gone for and when will you be leaving?