Harald, I thought I had them but I can't find the plans. They were designed in the pre-CAD days and were done by hand. The designs were published in the May 1982, November 1983 and March 1987 issues of Flying Models magazine. They may have some left. I can send you copies of the plans that appeared in the magazines and you would have to scale them up or use them as they are. I don't know if they were distorted to fit within the page of the magazine. Dan.
http://flying-models.com/