I just found out that the complete series came out on DVD over a year ago in Germany, and it has an english soundtrack. You need to have a DVD Player that can play Region 2 DVDs however. You can buy it at German Amazon website: http://www.amazon.de/Die-B%C3%A4ren-sind-los-komplette/dp/B005V34N54/ref=pd_cp_d_3

You can also buy this at amazon.com if you're willing to spend over $100.