Bartek
The station building is very like a larger version of Perleberg Sud. So it does look possible to change it's location from Poland to the DDR without too much modellers license.
A web site I refer to quite often for details of DDR railway matters is:-
www.ferkeltaxe.de
It is really about small railcars but is full of inspirational photos so if you don't like the vehicles you can just look at the background.
Regards
Bernard Lamb