I spent quite a bit of time looking for the same thing. Wasn't able to find much. This is one I was looking at before going with the Korg. It may work for you but I haven't tried it myself. I'm not sure if it would need a translator.
http://global.novationmusic.com/midi...ollers/nocturn
EDIT: Just came across some I haven't seen before...
http://www.bhphotovideo.com/c/produc...r_Control.html
http://www.bhphotovideo.com/c/produc...ontroller.html
Brett
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