Hello fellow Canuck. ( It was interesting that the chain ring is correct!!! LOTS to learn, it's fun)
If you like to ride your bike/seems you do, I'd go with John's chain tread repops. ( cream w/w or all black) I have about a dozen bikes with them ( riders and display) and they are superb. You can run higher pressure with John's so it rolls and pedals easier, LESS worry about a blowout. Pushing a bike home isn't fun, been there, done that.
That said, I have riders and display with original rubber too, but hesitate to go fast or far on the riders.
As far as shipping/buying from the U.S., it is pricey ( you probably know that), but it's pricey shipping there too. I'm getting a set of original tires sent from Texas, boxed, USPS Priority for around $58.00. It costs me more to ship a set of tires boxed from here to CONUS, closer to $70.00 but our dollar is only worth .60!!. All part of the cost of the hobby. I deal with it ALL the time. Beauty of a bike. Cheers, Bob