I have several remotes like this all of which broke. I could not find a casing model so I made one in tinker cad. It's rough as its my first model. It requires small screws to assemble. The model features 1mm wide holes for small screws to attach front and back, as well as battery cover. locators for he rubber buttons and PCB, cutout for the LED on the back, cutouts for battery terminals. With the new case you need to point the remote more directly at the target compared to original. Feel free to improve on it.