Parts made from several individual parts.

[Philippe Hurbain]

Well,
Since we already have 12 different coloured Duplo Car Base I think we could add 4 more "Hinge Control Stick and Base"

We could make these:
73587p01,  Hinge Control Stick Base with Black Control Stick   (already present as 4592c01)
73587p02,  Hinge Control Stick Base with Light Bluish Grey Control Stick
73587p03,  Hinge Control Stick Base with Light Grey Control Stick
73587p04,  Hinge Control Stick Base with White Control Stick
73587p05,  Hinge Control Stick Base with Yellow Control Stick
These are the 5 known colours on the stick.

Would that help?

You have a point...