Oddly enough, the old train ferry berth still exists in Dunkerque West but it is totally boxed in by a RoRo berth which was built outside it many years ago. The latter is used by Norfolkline and is their secondary berth when the main one at right angles to it is out of action or occupied. I don't know why they did not dismantle the train ferry berth as it can never be used again, assume it was cheaper to leave it.
The train ferry linkspan is on the top left in this picture with work being done on the RoRo berth to its right by a jack-up rig a year or two ago.
Brilliant description and photos of the train ferry berth in Dover on Dover Ferry Photos link below. It only lasted a very few years and the linkspan has been dismantled and cut up. The train ferry SeaFrance Nord pas de Calais is still in service, carrying RoRo traffic, but is a bit long in the tooth now. I believe she still has the rail tracks in place.
http://www.doverferryphotosforums.co.uk/viewtopic.php?f=11&t=567&hilit=train