Hello. I found nice programm OSC Commander (http://osc-commander.com/) and made layer for ardour / mixbus.
http://i77.fastpic.ru/big/2016/0414/01/182a2ad98211a565333471dd4add9801.png
In OSC Commander Editor you can add some objects (float/integer) - so in this we can add faders (but i found bug with it, but developer says can fix it).
So, hope you enjoy this =)
http://vk.com/doc14803895_437424991?hash=55b8caeed913cb488e&dl=e8fed8c963d2860388