Shops

The largest mind sports specialist in the Netherlands will run a shop selling a wide variety of Go related items, other games and some more fun gadgets. They will be open every day except on Wednesdays.
Have a look at https://www.schaakengo.nl/en/ to get an idea of what they can offer.

will organise a "Magic: The gathering" tournament on Saturday 31st of July. During that day they will also have a shop at the playing venue. At other days you are welcome to visit their regular shop which is within walking distance of 1931.
Check https://labyrinth073.nl/ for their opening times at the bottom.