Evening Steve,
I knew two stores in Belgium who sell these two volumes. The one in Brussels is called "Librairie de L'Escadron". Unfornetatly no websale. But here is a link to an article about the shop. It's in Dutch but perhaps you can swing it through a translator:
http://www.brusselnieuws.be/artikels...-over-oorlogen
The other one is called "De Krijger" in Erpe-Mere (near Alost/Aalst). They have a (small) website:
http://www.dekrijger.com/
I can't remember how much I paid for the first vol (about 80€), but vol 2 had a price tag off 106,60€.
Kind regards,
Dirk