I’ve been asked if I know anyone who would like to quote for the creation of a model. Some info below. But email me (firstname.lastname@example.org) if you want more detail.
The brief I have is very simple so the materials aren’t clear but it seems to be open to your design. I assume wood, metal and/or plastic would be fine. It is basically a big coil/helix covered in LEDs, which must be connected so that there are different groups of LEDs that can be controlled independently. So some electronics knowledge is needed. The whole model is about 30cm long.