Voltage Controlled Oscillator
VCO 6HP is a single VCO laid out in a similar way to the VCO section you would find on a monosynth. VCO 6HP includes a glide (slew) function, so this is a great bonus. The VCO can go down to low frequencies so they can be used as an LFO.
http://www.analoguesolutions.org.uk/concussor/vco6hp.htm
No info about availability.
$110