Thanks so much for sharing this, it is almost impossible to find a replacement and expensive to ship overseas. I'm having one printed here in South Africa :)

Thanks! As I don't have a Navigator, I can't realy help you to design the chain glider. I remember seeing some drawing on the web years ago. Regarding the material, TPU is good in abarasion resistance, and is oil resistant too.It is available to 3D printing, so it could be a good option. It is only harder to print in TPU than in PLA or Nylon. Designing it "Flat" is easier, but the part could be too big to be printed on standard 3D printer. Designing it "mounted" (as I did) is a bit harder but make printing possible on a Ultimaker for example. I print mine in Nylon, only because I had this material in stock. I finally never use it because I find a new chain glider on an italian website. But when it will be too old, I will have to use the printed one ;-) Let me know if you print one and if you are satisfied by the results! You can find on CAD file (but very expensive..) here, maybe it can inspire you: https://www.turbosquid.com/3d-models/3d-cagiva-elefant-chainslider-n-series-1203138