Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:3900069.

Power ON/OFF button replacement with your own text. Write your name or something else (5 to 6 letters) by editing the Text Object in 123D then extrude 1mm Move 50mm the text to the left on top of the button Then lower text by 1mm and merge both object with text substract of the button

T14SG is one example.

Let me know if you cannot do it and want some text i can edit and update the package with your own request.