As far as I know it's still there, though I don't know when it was last used. I think on the recent recreation of the steam hauled Golden Arrow, passengers were bussed to Calais Ville.
The site has been cleared according to Google Earth.
Most French ports had a Gare Maritime but none remain in use.
In mainland Europe, Oostende would still be usable.
Germany has Emden Aussenhafen and Norddeich Mole, Hamburg Landungsbrücken (Hochbahn not main line!) and Lübeck Skandinavienkai, the island stations of Borkum, Langeoog and Wangerooge, and most significantly the train ferry terminals of Puttgarden and Sassnitz (Mukran Hafen). You could also include Lauterbach Mole, but that's only round-the-island stuff!
And Lindau Hbf and Friedrichshafen Hafen on Lake Constance.
