As from today, all tickets are also on sales in the FNAC and Night and Day shops all around Belgium:
http://www.librairie.be/fr/magasins/recherche-magasins.html
http://be.fnacspectacles.com/listePointVenteEdito.do
More details about the April 13th event coming soon. Until then, you can watch the Belgium Beatdown III videos on http://www.e-k.tv/videos/1666-mma-belgium-beat-down