This is how I made the inner housing for the speedometer. I did the print in white PETG, able to withstand higher temperature compared to PLA filament. The STL file can be downloaded for free from the link below. Can be printed in with support to the build plate.

The original housing had a cutout for the reset-knob for the trip counter. Don’t know why, but it is probably done because difficulties when mounting the clock with the knob attached?

For the rubberpart sealing the reset-knob shaft, I will make my own fix. Can’t be bought so I will try to make something from a rubber tube and see how it works. If I face any difficulties when assembling and need to modify the 3D model, I will upload a new STL files on this site.