This has been modified to work for Suzuki Jimny key.
Cap screw hole was also moved to make a better tighter fitting cap.
Holes for buttons was raised 1.5mm so that buttons could not easily be pressed inside pocket.

Use solid infill for a more durable Key.

I actually did not remix the design to allow key to slide in, I only cut out a small piece to allow it to fit. So add a pause at layer 45 then insert the key (holding it in place with prestik) and continues printing. I think sliding the key in afterward might be a mission.?

I used Creality Ender 3 Plus with upgrade Extruder together with Prusa slicer.