McMichael Davis in Oakville can help you. Sorry for the late reply but I just saw this thread. It's a 500 buck extra cost but we lived aboard for 5 years including winter in Mimico.
Thanks for the late reply. After some searching I managed to get insurance with MD Marine. So far they seem alright, I have no complaints and their rates are reasonable. I pay about $500 for year round liveaboard in-water insurance on a 30 foot sailboat.