A few years ago, Delta went through a major restructuring and that interrupted their supply chain. I would have thought they'd have that back on track now, but apparently not?
I'm guessing that the national chain of which you speak is KMS Tools. The store near me happens to be HQ and I've found the staff to be very good and the selection of woodworking tools equal to automotive/metalworking tools. They are usually my first stop when I need something repaired. A 3+ years ago, they got my Delta DJ-20 sorted out, but I haven't had to fix anything Delta since then.
The other tool company in BC that comes to mind when you mention Delta is Summit Tools.
By the way, Ultimate Tools in Burnaby, BC carries Powermatic. You won't find Jet Woodworking in Canada, however.
PS: Funny story. A customer of one of the aforementioned stores was so disappointed/upset with the stock levels of a certain power tool that they did an internet search for other local suppliers and somehow determined that I was one (I'm not!). I got a very strange phone call that day.