I found another online shop (Autoleads has no online-shop):
www.autotechnik-dietz.de

Unfortunately this little shitty adapter costs about $ 110,-- .
I asked if this is just a simple adapter without any electronic parts but it is not. It has a built in logic ... And I don't get the electronic plans for it - What I can understand at this point..

.. As I saw they order some of their parts at www.autoleads.co.uk.
The world is small, isn't it.
TeeMcBee
Got my Mk2! # 080000143