Subject says all. Wondering if it can only be purchased online or if it’s sold in shops anywhere.

(update) Still looking for a store that will sell these vis-à-vis. Nice to know about the option in Poland but I would like to find it in Western Europe. It looks like the 3 official online sellers ship from warehouses in Netherlands, France, and UK. Would be useful if we could simply go to the warehouse to buy one/some.