I made a few of these for repairing / rebuilding my motorcycle forks. They are a great little tool to prevent the fork seals and dust seals from getting damaged during install.
I included 3D Files for all common fork sanction diameters.
I saved the .STL file in a larger (more triangles) higher resolution part than my initial pictures. You can see the .STL segmentation on my part that I used. I would still recommend sanding your parts to ensure smooth transition and prevent the seal lips from catching. I also applied grease to the seal bullet to aide in install.
Print these upside-down (i.e. with the thick part on the printer bed) No need for support.
Let me know if there are other sizes that need to be added