Katana, you are doing more harm than good by referring manufacturers to follow museum pieces. Some museums are better at color research than others, some restored tanks are better than others. You cant make these generalizations. The RAL WW2 colors exist in four locations in Germany. At RAL itself, and at three different German universities. I would suggest that you follow up on those leads given your passion for the subject. You need to catch up on what is already known on this subject. Referring our TS manufacturers to Tamiya box art and museum pieces is not good.
If you are reaaally interested in this, may I suggest you contact me by private mail, and I can bring you up to speed. Then you may even like to go to Germany to see the colors in the flesh.
Youre passionate, I understand. My suggestion is to acquire more knowledge and do less proselytizing