Fitted wardrobe at reasonable price

try this guy, he won an award for craftsmanship - not in Brussels, but accessible by train if you don't have a car
https://www.facebook.com/Backwoodcreaties?hc_location=stream
his phone number is on his FB page

Have used Les As du Placard and they are very efficient and good: http://www.lesasduplacard.be/ only in French or Dutch though, have various showrooms. I use the one near Stockel Metro:
Avenue d'Ophem 14
1150 Woluwé-Saint-Pierre
Belgique
stockel@lesasduplacard.be
Tel: 02/772.56.06
Fax: 02/772.00.49
heures d'ouverture: du mardi au samedi de 10h à 18h