Knob with switch built in

[Dieseljeeper]

You might check with a Grove dealer as they used a knob with a momentary switch mounted in the side on the shifter on an ap308 model crane. It is for a declutch valve and the wiring is ran through the shifter which, if I remember right, is 3/8 NC.

 

[Coyote machine]

I'd go with the Suregrip that FIT Rite Hydraulics sells. I got my Suregrip trigger switch joystick, similar style, from MIE, (Michigan Iron & Equipment). It has a single switch that works my front remote off my diverter valve. I move the stick left or right and while pulling the trigger it opens or closes my grapple or moves my plow blade left or right. Works great, attaches to existing FEL stick.

 

[Scrambler82]

Water proof is something to consider and some of the shift knobs with switches are not.
If you plan on the knob/switch to last buy with purpose in mind not what can I get cheap.