There are a few Canadians who tie on a commercial scale, but a lot tie for shops and don't advertise. Guys like Jeremy Davis, Al Grombacher, Jamie Webb, Damian Welsh, Darren MacEachern, Mac Warner, Lornce Lisowksi all do or have at some point tied on a commercial scale. You see it more with the Atlantic Salmon flies than the western ones. I'm sure if you were to contact any of these guys, they could give you a fair price and an above average quality fly. Take a look at the Jstockard fly market, it's all "local" joes who tie and get a bit of cash for it. piscator flies is one site I've used who tied a few custom patterns for me. They are around, they are just a little more difficult to find I suppose. These guys likely don't make a living off their flies, but supplement it.
As I understand it, another reason that you don't see much in the way of local tiers is that many were unable to keep up with demand, or were simply unreliable with supply (as they had other jobs and such) and so the demand was made up from off shore. As I understand it, Africa is no longer the monopoly of bulk flies as China and Philippine also produce large numbers with Highland Flies, Raineys, Idlwylde and Montana FC.