On the face of it, the Dutch International would be a perfect candidate. Able to play either in midfield, or push forward to a role just behind the strikers his adaptability would certainly be useful.
Possibly one of the best attacking midfielders in football, the Netherlands man is currently at Galatasaray, however there is a distinct issue with the player which put Sir Alex Fergusson off signing the player, and should also put off Moyes. A demandingly high wages demand.
There is little point forking out extravagant amounts of money for his wages when there will not be a long time left in his career and when the money could better be invested elsewhere.