MASECA is a flour to make tortias or papusa's ets.. I know they mostly sale it in latin american stores but where in Toronto would they sale this product..!?
It's pretty easy to find. IIRC they carry it at No Frills and Price Chopper. Besides those, you can get it (along with a variety of masa) at La Tortillaria Market at Bloor and Dufferin. There are also a few places on augusta in Kensington Market that carry it
I actually found some at my local Highland Farms supermarket (Woodbridge), they have a pretty extensive ethnic section. I think it was $5 for a bag of 2kg.
----- Highland Farms 3300 Rutherford Rd, Vaughan, ON L4K 5Z2, CA