I'm doing a build where I will be using an EMG P and 35DC. I will only use the passive tone but here's my problem. I want to use a blend knob. Does EMG sell their blend knob by itself? This build requires the use of the old school speed knobs, thus I would need split shaft knobs. Can I use any 25k split shaft pots for EMG's? Does EMG make split shaft blend pots?