I'm sure you are right that some jack the shipping prices to Canada , but it also isn't as cheap as you think . I have shipped to friends in Canada and a single part in a small padded envelope (about 5 ounces) costs me about $10 , and an average kit in a 10 x 7 x 5 box weighing less than 2 pounds costs me about 22 dollars . Both are double what it costs me in the U.S. , plus I can't do it on line . I have to take them to the Post Office to ship them , which may be a real hassle for some people .
If you have a friend in the states you could always arrange for him to buy and ship parts for you . . . just an idea .