It is nothing to print with a 3D printer, but with a paper printer :-).

I bought a Logilink wireless keypad on Amazon for 10€, in order to use it as a wireless controller for my GRBL-CNC-Laser. The main functions I use are now on the keypad.

https://www.amazon.de/Logilink-Kabelloses-Keypad-Ziffernblock-Tasten/dp/B00KYPJAMK/ref=sr_1_fkmrnull_3?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&keywords=logilink+wireless+keypad&qid=1554380939&s=computers&sr=1-3-fkmrnull

I printed the stickers on self-adhesive paper, cut them out and stuck them on.
In the "Universal G-code Sender" some buttons do not work (UP, DOWN, BACKSPACE+another key, ENTER) So the "Numpad0" works as a switch for the grey-functions, in order to get the maximum on functions on the keypad. Theoretically, the keys could get a 3rd or 4th function when the Numlock key is used.

Feel free to create your own wireless keypad :-)