I suspect, that someone connected with the Polish stuff decided, that it's worth to make more people acquainted with C7P, catching an advantage, that 1 or 2 photos are known with the German markings and there appeared nice plastic model with a German name
http://www.rctrax.pl/product/mirage-...-1-75/?id=8871 
I'm not suggesting, that it should be removed or replaced with Stalinets (which was used in much greater numbers, and there are known photos of it hauling German guns) - I just wanted to indicate a possible free slot in a crowded OOB.
Michal