This Module is currently available.
MG ID: 5360
VCO inspired by the TB303 VCO
TO3, a VCO, Insired by the tb303 oscillator,
-Only 6HP wide (30mm)
-Only 30mm deep
-less than 25mA @12 and -12volt .
http://www.engineersatwork.nl/dtronics/pages/modular_to3.html