Just one 2p3t on/on/on is what you need. Just like this
https://www.philadelphialuthiertool...ini-flat-paddle-toggle-switch-3-way-on-on-on/
Does the guitar have pickup rings? You could wire it up to a Triple Shot. If not, are you opposed to using push/pull pots? Do you need full/split and series/parallel, or just one of those selections?
A push-pull pot is simply a DPDT on-on switch attached to a potentiometer. They are totally independent, with the pot acting on the horizontal plane, and the switch acting in the vertical plane. (Well, actually opposite if the guitar is in the "playing" position.)
It's a good thing I'm not an electrician.
And to make matters worse, "electrician" and electronics tech, are different worlds. An electrician knows black to be "hot." In electronics, black is almost always ground. I dang near electrocuted myself learning that lesson.
And to make matters worse, "electrician" and electronics tech, are different worlds. An electrician knows black to be "hot." In electronics, black is almost always ground. I dang near electrocuted myself learning that lesson.