Last attempt

Let's see if this works.

Andy,  I too am a Canadian modeler.  I think that the issue is purely a marketing one.  We have a tenth of the population of the US and, by their standards, are probably quite frugal when it comes to spending our modeling dollars.  There are some Canadian loco's out there, and for the rest, you'll just have to rely on modifying and heavily detailing some US types.  There are lots of parts available to do this - Details by Eric is just one source that comes to  mind.  There are several companies that make Canadian prototype railcar kits and structures too.  Trains 'n Such in Calgary and George's Trains in Toronto are two sources that mail order and both used to carry fairly good inventories of Canadian stuff.  Good luck!