Jochen,
I was also looking for a 1979-1981 Z-28. It was the second car I owned back in 1981. I was a senior in high school and I traded my VW Rabbit for a slightly used 1980 Camaro Z-28, dark blue with baby blue stripes, cowl hood (functional), with dark blue interior. I had GT qualifiers (tires) all around, and a nice stereo, tape player, amp, and 6x9's. My girl friends could hear me coming down the road
Man, I miss that car. Only car I really wish I would have kept all these years.
I like that style / generation of Camaro's.
Keep your eyes open, there are some nice ones out there! Oh, if anyone here in the states see one like I had be sure to let me know!