After some further research, it was with a Prussian unit that Manfred had begun his military career. So in those photos that he is seen wearing a dark tunic, it is the formal dress, or pre-war dark blue Ulanka. In the field, he would wear the feldgrau (field grey) version of the Ulanka, neither of which are regulation aviator uniforms.
I have a feeling these are not the colours you envisioned for your bust, but there might be a third option. Given his status, there is a possibility he could have had a custom tailored tunic, but who knows what colour that could have been.
I suggest taking the image link of your favourite rendition and input it here:
http://scalemodeldb.com/paint
Once you click the submit button, it will give you a list of the closest paint brand choices.
HtH
regards,
Jack