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Yes, also in Germany we had translated versions of those comics. They were made by the then "underground" publisher Zweitausendeins, who started off entirely with mail order sale. I guess a "normal" bookshop would have never put this stuff on the shelves. May be in Berlin or Frankfurt you could find small Comic shops who would sell that, and other imported stuff. But for the people elsewhere it was rather difficult to get hold of such comics.
And they were expensive, too. I remember, I was always skinned in those days anyway, because the little money I had mostly went into dope and my moped. A Freak Brothers comic book cost then 15 DM or so - wich would be something like €50 today. So most of the stuff I read when I visited other people who had them.