Marco de Vivo built a MIDI adapter for the Neo Ventilator.  He says the Neo Ventilator is a great leslie simulator, but it lacks MIDI, so he built his own MIDI adapter for it.

The UPS powered adapter includes a stereo output jack for Neo Ventilator connection and foot pedals to control slow/fast velocity and stop rotor.

This video shows the Ventilator and the adapter in action.