Givet, I don't know. But I can find out.
I know about possibilities in Beauraing. The priests of the sanctuary (not the parish) take people in a room next to their home. I don't know how much and if they will charge, but it should not be much. It's about 12 km before Givet, still in belgium. There are all kinds of possibilities to eat and for shopping in this village too. It's a marial sanctuary. Many other villages in this area of belgium do not have shops. But I can ask my friends in Beauraing if there is anything in Givet.
I will be in that area within 2 weeks. You won't need the adress before..I guess.
I don't know how you are walking, but if you come from the direction of Chevetogne (where you could sleep), you could also spend a night with the Tiberiades. Great bunch of people. But then Givet would indeed be the next stage.
Just send me a PM. I have walked in 2000 from Oudenbosch (noord-brabant) to Beauraing. I can give you the details from this trip.