The Commune in Brussels that you are looking for information is 'Vorst' (Flemish) or 'Forest' (French). The Commune code (zip code): 1190.

I don't know what the rules are here for requesting genealogical information, but you might begin by contacting the Commune directly:

Commune de Forest
Rue du Curé, 2
1190 Bruxelles, Belgique

Telephone: +32/2.370.22.11
Fax: +32/370.22.13
contact@forest.irisnet.be