Mike Pope Flexcore preamp - used, with no issues. The configuration is 3-Knob: Vol/Tone Stack - Treb/Bass Stack - Lo Mid/Hi Mid Stack + A/P switch. It is currently set up for a single battery connection which can be 9 or 18V. The preamp can be used with 2 pickup configurations by adding your own switch or blend pot ahead of the preamp (I was using it with a selector switch).
$250 shipped in US/Canada
$25 for 3x black John East stacked knobs
$250 shipped in US/Canada
$25 for 3x black John East stacked knobs