Checking with a friend in Canada that may be able to distribute but after Jim's post I decided to check USPS.com. Priority flat rate has increased to $20.85 to Canada (only 90 cents) but first class should be just over $5 US. I will confirm with my local post office on Tuesday (Monday is a holiday) and if this is accurate I can ship that way. I don't think it will take much longer than priority mail would.
Checked at the post office today. First class shipping to Canada is $11 from the US. If I can get at least 5 orders in Canada we can do $7 by having them redistributed through Canada. Not much of a savings but closer to what it costs just to ship in the US.
There is no customs fee for bringing books across the border so this is completely legal. So the way this breaks down is the cost of getting them close to Canada plus the shipping cost from within Canada, which would be just over $5 C. (What's that? $1.50 USD? LOL!) About $4 USD plus the cost of a mailer.
Let me know who in Canada is interested and I'll put a list together to make a shipment up there. I did something similar to get signed copies to Europe and just shipped almost 30 copies there this morning so this is doable.