I've been looking into that same topic as well. I wanted a control surface with motorized faders that works with CEP. I don't think there are any at the moment that work with CEP that have motorized faders. The only control surfaces that I know work with CEP are the Tascam US-428 and US-224. They don't have motorized faders though.
I have heard though that Syntrillium the company that makes CEP will possibly be supporting in the near future the Mackie Control which does have motorized faders.