Faderfox's new MIDI controller has all the knobs you could ever need
32-knob midi controller
Bastl 60Knobs – Pump up your jam, 60 knobs at once
Amazon.com: AKAI Professional MIDImix - USB MIDI Controller Mixer with Assignable Faders & Master Fader, 24 Knobs and 16 Buttons, 1 to 1 Mapping With Ableton Live : Musical Instruments
MIDI Controller with Loads of Faders, Knobs, App Support: Livid DS1 on Preorder [Gallery] - CDM Create Digital Music
Do You Love Knobs? This New MIDI Controller Has 68 Of Them | Telekom Electronic Beats