Well, the parts store can't get the inner bushings that I need. I guess I will have to order some from somewhere else. I should have left the stock porsche buching in place until then, but at least I have learned a lesson for next time: don't destroy an original part, unless you know the replacement will fit. For now the outer bushing will have to do for towing and such; the body isn't even started, its just a bare shell anyway.
So, Superman, any chance you would share those notes?
I don't speak a bit of german. Guess I could alway learn.