I live in Canada too. It is NOT outright banned at all. In OTC preparations, it has to be <4%. With a prescription, pharmacies compound it in up to 20% concentrations.
Photographer's supply shoppes sell it raw as it is essential to photo development as a reducer. I live in QC & I got mine from a photographer with a studio here. Check yr area for these places. Hobbyists get theirs from them too. Kodak make a good one.