response in your text

. . I have already contacted the mentioned archive in Brussels  . .  « Archives Générales du Rpyaume » or from which municipality ? – and I'm on a progress to reproduce a file regarding a family relative. Do you know if it can be sent by e-mail or just in hard copy ? I think it depends upon what you requested, perhaps they could both. 
In addition, I found on FamilySearch an immigration documents from Antwerpen, 1926, that with a careful guess I belive it also related to my family. What databases do you recommend for such documents ? Here Marcel did answer.

Kind regards,
Etienne JONES