If you know how to solder you could even make your own keyboard/macropad.

its really easy.

just get a broken mech-board that you can gut for parts. [you can get em really really cheap]

and get a arduino.

{if you have access to a 3d printer, print a case}

then handwire your macropad

at most you will have spend 10$ in total [of which half goes to the arduino]