I built the fork on my own.
The fork bridges are from a MTB, made for 1" pipes. The one in the center is rotated 180 deg, and the top bridge is from a motorbike with some modifications. The spring is so strong and installed under tension, that there is actually no movement in the whole system...more for show as for function!
I'll do a close up shot for you.
As this bike will be for display only, there will be no functionable engine installed.
I sometimes think about making it an e-bike...but not for the moment.