This Pedal is currently available.
SE-02 Expander
STUDIO ELECTRONICS EXT BOX
The Ext Box from Studio Electronic is a performance-oriented breakout for the Roland SE-02 synthesizer. It adds a large, weighted filter cutoff knob, manual gate button, warm output overdrive circuit, and adjustable high-pass filter to the already-formidable features of the SE-02. Additionally, rugged External In and Output 1/4" jacks offer greater durability for use in situations where constant setup and breakdown is required.
EXT BOX FEATURES
Breakout box for Roland SE-02
Large Frequency Cutoff knob
VCF CV input with Source switch
Gate input and manual trigger
1/4" External input with gain
Output drive control
High-Pass Filter with cutoff control
1/4" output jack
Includes DIN-4x 1/8" expander cable
These merchants probably sell this module. Huh?