Me neither! But yes they do sell coffee beans as well as tea. Although most of the beans are blends, not SO They also sell a range of coffee equipment, amount and type depends on the store and how big it is. The one in the Passage is quite small, and therefore limited. But the franchise owner has changed since I left Den Haag, so the shop may have changed its direction too.
Alternatively check out the Kaldi, again a franchise, but more likely to have equipment including these Bialettis. Not sure of the Den Haag shops address.