I use a dental tape (oral B) but I warn you, your dentist won't like it! Regular floss (coated, uncoated) hurts me when I floss, so rather than not floss, I use the tape. But it doesn't work as well as floss does at grabbing debris. My dentist acknowledges it is better than nothing but not as good as floss, and makes me take samples of floss to try. Tried a new 'spongy' floss he gave me last night and I had trouble sleeping because my gums were throbbing!!!

All this to say, you can buy tape in Canada, I'll take a look to see if we have the Colgate one, in which case you might be able to buy online here and ship down (I think London drugs is Canadian, but not near me).