The RCRA (Royal Canadian Riding Academy) hosts a couple of bronze dressage and hunter jumper shows throughout the winter. I don't know if this is what you are looking for but they are great for some extra practice and feedback. It is located in Cedar Valley which is about 5 minutes east of Newmarket.

Here is the link to the show section of their website: http://www.rcra.ca/?page_id=196

Hope this helps!