Your stove is ok and canisters can be commonly found in Western Canada at least. I have that and the older puncture type cylinder stove you are concerned about.

The other stove trapped the cylinder with two wire arms and punctured it via the burner when the stove was screwed down onto it. A seal on the burner part kept the gas in but you could not unscrew the assembly until all the gas was used up.

The stove you are looking at has a seal inside the cylinder itself and will reseal whenever the burner is unscrewed.

If it were me I would have two cylinders, one I was using and one a spare. When you switch start looking in outdoor type stores for a replacement along the way. That gives you 3 - 4 days to find one.

Through northern Ontario maybe take two