My first P 50 i had was D 542 what is now painted in white. It seems it was yellow first, coz the floor panel and the dashboard were yellow before it was painted white, then blue, then red and then white again.
It seems it is bit like the Messerschmitt Tiger. Every car is different and you can't replace bits from car to car.
Anyway, we should love the microcars as they are !
Cheers