take a look at yellow page,it should be under 'fabric' category. I do know there are one such store at Bay Center(yonge and bloor) and another at dufferin mall in toronto. price can be varied a lot all depending on your requirement.
by the way, IKEA has such fabric for sale too, very pretty.
Re #12930: 请问要带哪些床上用品，例如被子，要不要带垫被？这些太占位置，租房时房东会不会提供。