Globe

Try Standaard Boekhandel
(https://www.standaardboekhandel.be/home.action)>
If they do not stock them they will now where you can find one.

The most complete map store in Brussels (but they are closed THIS week Mon through Wed for the holiday):
Anticyclones des Açores
Ouvert du lundi à samedi de 11h à 18h.
Wolvengracht 34 Rue Fossé aux Loups
1000 Brussel / Bruxelles
Tel. 02/217.52.46
www.anticyclonedesacores.be

Or try :

Institut Géographique national  

Adresse : Abbaye de la Cambre 13, 1000 Bruxelles
Téléphone : 02 629 82 82

Also type in Globes on Google search engine. On example is: https://shop.nationalgeographic.com/category/maps/globes?gclid=CjwKCAjw-...

In all Fun shops in belgium , one can buy a globe , even on line in their webshop , look for "wereldbol " in the search area ( they claimed www.fun.be ).
But there is far more fun in Belgium .

You could try Papeterie du Parc Leopold down the Rue Belliard, corner with Rue Froissart. Expensive stationers but lovely items. Closed on Saturdays