Dont forget customs and duty fees when shipping accross borders. Canada may impose import fees and taxes. Even if the shipping is low or free for international orders, it still has to go through Canadian customs. Customs agents have broad powers when determining customs and duties. It may come through with no fees one time and the next time it will have extra charges.
If this is your first time buying from overseas, try a small order first and see what happens. You can also go to the Canadian customs website and see how photo etch will be classified and what fees to expect.