Correct.
Been searching the internet for better options, but I'm not seeing many. I wasn't aware of how much being in Canada makes it more difficult and expensive to source these.
If you have the patience for all the shipping, Stig's idea of having someone ship them to you from the US is a good one. Not sure where you are, but I got an estimate of $10 US ($13ish Canadian) for shipping. It looks like Dr Pulley sliders are inexplicably cheap on Amazon here, $24 USD shipped.
Depending on how much you trust internet strangers, I'd help you, bearing in mind that I'm not already familiar with what's involved in shipping things to Canada.
Otherwise, in your shoes I'd probably order from here:
https://www.buggypartsnw.com/index.php/dr-pulley-slider-weight-20x12-for-250-300cc-8-pack.html Shipping to Canada is apparently $16 USD. Kind of expensive, but the sliders should last a very, very long time.
OR, you could just wait and see how they look -- unless you've done that already?