I have for sale one of the Audere drop-in jazz preamps. It is the 2 band model.
•Volume, Z-Mode switch, Volume, Treble/Bass stack, LED Battery Meter & Output Jack.
The two volume setup is preferred by traditional players who like the passive bass setup and by those who favor playing on one pickup. The pickup mixing is easier to control with a vol - vol setup when you have a small percentage of the 2nd pickup mixed into the output.
http://www.audereaudio.com/JZ3.htm
Perfect condition and it kicks a**, but I am just leaning toward passive setups these days.
$105 shipped CONUS