Where to buy pink fir apple seed potatoes?

I am aware I can buy online but would prefer to look at the quality of the potatoes in the bag.

There are no garden centres near (shocking I know!) so I'm looking at high street retailers. Does anyone know of any that would stock this variety?

Had a look on wilko, lidl, aldi, tesco, homebase, poundland, b&m, home bargains websites to no avail so not sure if I am forced to go online?

Thanks