NYandCo had tons of colored bottoms but I don't know what their Canada situation is.
You would think a big chain like Sears (which I thought was so much better than the Sears in the US but maybe they aren't connected?) or Hudson's Bay Co (is that Macy's now?) would have good options. Are they not good stores?
Forgive my ignorance - I was last in Winnipeg at age 12 (it was Canada Day so all the businesses were closed!) but spent 10 glorious days in BC two years ago. I would love to move to Vancouver if the whole immigration thing was not an issue (I do know you don't live near BC Shannon )