Well, we don't have a GP40-2W in n scale yet...
Or an M-420 which was another handsome and uniquely Canadian locomotive until recently.
With transfers of ex-BCR and CN units to various shortlines in Canada and the United States, there are now numerous road names to entice a manufacturer . . .
I am pleased to see Rapido Trains issue a new locomotive in N Scale, and hope that there are more to come. The SW1200RS and Royal Hudson are obvious candidates.
Tim