They can be purchased on Canada Post's website:
https://store.canadapost-postescanada.ca/store-boutique/en/414292111/p/2025-places-of-pride-permanent-domestic-rate-stamps-booklet-of-8
Weird that they don't have that in the article considering the store page also has some explainer text.
That song is definetly a groove. Low, rhythmic piano almost always slaps.