Sorry, Hasse. I don't think this film has ever received a DVD release anywhere in the world.
I suspect, that like "Once Upon A Time In America", there are problems with who owns the copyright for the movie, and therefore one single company won't be able to release it properly. I don't think you can even buy it on video anymore either.
Your best bet, if you do want a video copy, would be to go to eBay. However, any DVD editions that may exist, will probably be pirated copies, and thus, totally worthless!