Badminton is becoming more and more a popular sport here... However, a lot off material isn't imported in Belgium (for example, no mavis 350 or 370). Most rackets are available, but you can't test them..
I have no problem finding badminton equipment in Belgium - Mavis are available in most shops. Rackets do tend to be more expenisve than the UK - and testing them is a problem. However, I find that its easy to buy equipment (and get advice) at tournaments.