Your not too far from Brussels, can you try there? I work in Saudi Arabia and work with a trainer when I go back to the USA on my R&R's (rest and relaxation) each two months.
I was in Liege in May and worked out at Jim's Gym. It was nice, great staff and really great guys working out there. I was really impressed with Liege, and Belgium. You live in a wonderful county. If there is a university or college near you, try the sports staff there. See if they offer a sports physiology program. Perhaps they can set you up with a graduate student that could use some teaching experience. I know this is not much, but keep looking and you'll find someone.