Olympus OMD EM-10, Eye Cup

I own a lovely camera, the Olympus OMD EM10, the original, mark 1. I have other cameras, but this is my workhorse, it's light it goes everywhere and has a rather annoying floor. The eyecup always works loose. I noticed it when I bought it but became annoying when I lost the original. The replacement for £25 broke months after purchase (genuine, official, OEM).

This eyecup is not perfect, there are minor gaps between camera and cup (seen in the images), however, it is constructed of a single c