4 knob midi controller with endless encoders

I'm looking for a 4 knob USB - midi controller device with endless / infinity knobs.

Imagine cutting the bottom quarter from an MFT :-)

Attachment 28837

a) does anything like that exist?
b) any links to kits to make one?

I've been searching around but it seems they're all with ordinary pots rather than endless

I would love a 6 encoder version

I'd go for a 4 Knob controller with two buttons. Or 8 knob with 4 buttons.

Behringer BC44? 4 knobs/switches and a few other buttons. 5 pin DIN only. Not much smaller than my Twister.