I'm not sure, but I have an answer: ItalDesign Marlin based on chassis of Lancia Thema.
It is a Lancia chassis, yes, but not the Thema..
Orca, Medusa and Marlin are all supposedly based on the Delta 4x4 platform.
Indeed it is based on the Delta 4x4 platform.
However, since this was technically locked for dzima he gets the point as he got the Lancia bit but didn't get the chance to have another go at the model, and now the answer is out!
Thanks for your contribution anyway Trommel, you were right.