I just discovered that Three's Company is now on DVD in Germany under the title Herzbube Mit Zwei Damen. Seasons 1 and 2 were just released in one box combined in November with our Season 1 cover art and I see that Season 3 is being released in January with our Season 3 cover art. Take a look:
http://www.amazon.de/gp/aw/d/B00M4QVKXY/ref=mp_s_a_1_1?qid=1418180785&sr=8-1&pi=AC_SY200_QL40

http://www.amazon.de/gp/aw/d/B00OYTHZG0/ref=mp_s_a_1_2?qid=1418180785&sr=8-2