IBIS World: Search for industry reports by keyword (e.g. e-commerce, online shopping) or NAICS code (e.g. 45411). On the search results page, use the "Country" filter to limit results to Canada.
Statista: Search for statistics by keyword (e.g. ecommerce, online shopping, internet shopping). Use the "Location Focus" drop-down to prioritize results for Canada.
Mintel Reports: Search for e-commerce. Use the Region filter to limit results to Canada.