Shipping between Canada and the USA usually makes sending one or two dollar items impractical. If the files are USA made then they are worth something, but still not worth shipping just one. A standard nicholson cant file has two 30 degree and one 120 degree corner.
There was a few other saw files by nicholson too though. One similar to the cant file but it only had teeth on one side and the other sides were smooth, called a "safe back" so you did not screw up what you were not filing. They were basically a non-tapered barrette file.
There were also files marked "crosscut", specifically for sharpening crosscut saws of course which had a slender teardrop cross-section.
There were slim and extra-slim taper three-sided files for general hand-saw sharpening and non-tapered "blunt" files that were supposed to be for sharpening large band-saw blades.
I have all these types of files already, the only ones I might be interested in would be safe-back non-tapered files, but again just one would not be worth the shipping cost, it would have to be a box of six or twelve so the cost of shipping per file would be as low as possible.