Speaking to the Official Club Website, Royle admitted: "Negotiations are going on and the deal is getting closer. But there are still a few contractual things that need to be sorted out so it's certainly not a done deal yet."
Reuser joined Town from Ajax for £1M in the 2000/1 pre-season after having an impressive loan spell at the club where he scored Town's fourth in the 4-2 play-off final win at Wembley.
Reuser's wages are at a level where they are no longer sustainable in the Coca Cola Championship, and as an effect if he agrees terms with Willem II, he will join them on a free transfer.