STL Design for Remote Control Casing

I need an engineer/designer that can create an STL for my project that I can use with my 3D printer. I got my father a new 4K Xfinity box to go with his cable, but the remote (XR15 model) is too complicated. He has low vision and is starting to experience onset dementia, so he easily gets frustrated and angry over simple things. What I need designed is a clamshell casing that I can wrap around the remote. The design does not need to be complex, but it should be as simple as possible to avoid problems with usage. Thankfully the shape of the remote is mainly rectangular. It would be best if you have this remote as well so accurate dimensions can be taken. Scope of work: - Create STL file for clamshell casing - Design a flat cover that blocks all buttons except for the volume buttons, mute button, voice button, power button and forward facing IR sensor. Supports would need to be placed over the void areas of the actual remote so the case doesn't accidentally bend to push the buttons underneath. - A large paddle button for the volume up and down. Maybe a hinged seesaw that makes it really easy to understand what is volume up and down - Push buttons for the power, mute and voice buttons. These could be simple push prongs that extend underneath the casing that pushes against the real button, but must be in some sort of housing to prevent them from falling out - A thick lanyard loop at the base that will not snap off so I can attach a tracker for him