From a couple of Dutch mates, on FB;
Jeroen Thijssen - 22 time Dutch international, left back who was good at PSV, however a decent attacking Eredivisie wing back often struggles a level higher - as such at Frankfurt. Still, he's getting a bit older and now at age 25 he should be experienced enough. Excellent pace, cross, pass - but defensively (mostly due to his size, still a bit of a question mark) - I'd like him in a 532/352 line-up, next to 3 DCs.
Dirk-Jan van der Duim - Loadsa potential when he appeared on the scene, still has a ways to go to reach maximum level, I'd say. Press in the NL think he's going to play himself back in orange, playing on this level.