Sveta, I wondered if these pants might work for you. I just bought them in black (my One cold shoulder WIW) and they fit the bill nicely for a casual jeans alternative. They run fairly generously in size (a size 6 fits me with a little room to spare) and come in tall lengths.

http://www.nyandcompany.com/ny.....Twill-Tall

If they don't ship to Canada, let me know, and I can get them for you!