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With exchange most Canadian dealers should be right around the same ballpark as their US counterparts, the odd discount program that we don't do but day to day shouldn't be much difference.
As to the OP's question, start with any of the CGN sponsors in your area. Prophet River and P&D Enterprises both have access to the entire lineup.
You're in Alberta - check out P&D in Edmonton, they have a good stock of Nikon scopes. I bought mine from Cabelas as I couldn't find the model I wanted at the time.
Thanks for the replies all, i called a few places and actually got the best deal at Boyers in Maple Creek, picked up a Nikon Prostaff Target EFR for my 10/22