After a few years working with my Fuji X-Pro 1 on a daily basis the strap lugs were worn out. I had to send it back to Fuji were they replaced the complete top of the camera.
As you see that I don’t have the original diopter glass anymore, I lost it and Fuji does not sell them anymore.
The one I have was ordered as a glass for Nikon FM2 and or FM3, they have the same size. So, if you need one, now you know.