In the Netherlands molasses doesn't appear to be available in supermarkets and nobody I knew had heard of it. I did however track it down (thanks google) in a type of health/foreigner food shop known as "Natuurwinkels" and also online through some of the Growshops. It goes by the names 'vinasse', 'melasse' or 'suikerstroop' (in Dutch, perhaps something similar in German).
My jar (300mls cost 2 euros in the natuurwinkel) is from a company called Horizon and they call it Rietsuikermelasse (its organic). Nothing is said about sulphur being added so I'm assuming its unsulphured.