I lived in Zaventem (where Brussels airport is located) during my youth, but am moving out to live with my girlfriend in Kortenaken (located between Tienen and Diest if that's any help to you...), which would be to the south-east of Antwerpen.
Did you manage to visit any orchid nurseries during your stay in Belgium?
I never even thought about visiting an orchid nursery when in Belgium - I wish I had thought of it.