Thanks again everyone. I'll give a detailed update in case anyone ever searches for flat files and finds this posting.
1. Sam's Club won't ship to Canada. Neither will Nation Business Furniture.com which also had very reasonable prices. I tried Global Industrial and spoke to one person who said they'd ship and promised to call back but never did; and then another who said they wouldn't ship.
2. I tried over a dozen surveyors today. No luck. Some had said 'too late, already threw them out' others were still using them and others had never used them ever.
3. The ones on Ebay offer a freight shipping calculator that says it will give estimates of Canadian delivery -- but, it doesn't work. I have no idea how much the shipping would be. Otherwise, this would be a reasonable option.
4. I did find a Canadian company -- Buynowonline -- and they have Safco (only) and they are expensive. But, free shipping and no border issues. So, that a possible option.
5. I also called Mayline and they put me in contact with a Canadian agent and I called him. Haven't heard back yet.
6. I also found a Waterloo, ON company (Brennan Office Furniture) that has Mayline Flat Files but no website pricing. They promised to give me a quote by email tomorrow.
Ian