Being also in Canada, I can understand what you are speaking about... I also was looking for ultraspeed CDRW media in Montreal and spent considerable time with not much luck. I finally found only 2 places where it is available: http://www.ncix.com/
which is in BC and http://www.frostys.qc.ca/
which is in a suburb of Montreal on an Indian reserve which means no PST or GST... I admit to having "convinced" the Indian owner to get them as he had none when I was looking for them.
For non-Canadians, the media situation is not similar to what one can find in the USA as far as prices and variety. The Canadian gvt levies a special tax on media to supposedly help the music industry. As far as finding TY manufactured CDs, it is almost hopeless unless one agrees to buy online from the US and agrees to pay about 25$US for transportation... I end up asking my niece's husband, who lives in FL, to bring some from time to time or buy some when I go to visit them.