Land Rover defender internal door lock button.

These are ideal for reaching the button from the top if aftermarket seats or rail extensions are fitted. The top of the button protrudes from the top of the door card and has a groove to provide grip. The interface with the control rod remains the same.

There are more variations on the way, as I develop the design further. If you have any improvements, please leave a comment or remix this model. A STEP file is attached.

Disclaimer

Check part dimensions and print settings before printing. These print settings are what I have used and not a recommendation.