I believe these were already posted right from the start of this thread. Basically, if one would read the thread from the beginning, we are currently way past that point but I guess it's OK for the forum's literature database. However, I understand that most people are busy and do not take the time to read. It is 2017 after all... Again, the following webpage shows just about everything that is known about the car:
https://rallygroupbshrine.org/the-group-b-cars/group-b-prototypes/opel-manta-b-400-4x4-prototype/...any doubles would be superfluous at this point and confusing for people just tuning in. It is only my two cents though.
Anyhow, the first article is in Dutch, and the other in Polish (the car pictured at the bottom of both articles are also NOT the 4WD proto but a normal rally Manta). These articles are easiest translatable through OCR (image text capture). They are unfortunately less intricate versions of the article in German.
Again, finding the current owners of the prototypes is the current goal. As such, KG Motorsport has not yet replied to my queries. Maybe my emails have a tendency to pop in the junk folders since they almost always include hyperlinks...