There are a number of board sponsors that can assist with the legal importation of rifle scopes from the US (the export from the US in reality). However note the following:
1 - there is a fee - depends on the importer.
2 - depending upon the brand, you may run into warranty issues and if you have to send it back to the US, you will have to reimport it (and pay any import/export and shipping fees again).
Perhaps contact a Canadian dealer and see if they will match the price? Remember that with the current Canada/US exchange rate, you will be paying about 1.41 x the listed US dollar price.