Alfred,
the first thing I do upon waking up is reading your post and replying to it... as usual..
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Sadly, I only gathered three or four marks of interest, which was not sufficient to make it viable. Then there was a split among the interested parties whether they would like the luggage as original Pagoda set or a different one. I am myself of opinion that the original one looks less attractive than the one for 190/300SL So, in any case, the project is nowhere, although I have all ingredients gathered: found and excellent crafter able of recreating that luggage, measures, description, several photos of each piece of luggage etc, thanks to the phenomenal help from Members of this forum (got loads of info through PM).
BTW In Willingen there was one car with a fitted luggage behind the seats and it looked like this: