Iris controller for 3 Panasonic AG-HMC150 cameras
 

I shoot stage shows, musicals, dance recitals. I shoot with three AG-HMC150 cameras and direct the shoot, monitoring from a central location. I don't want to have each cam op decide on the brightness of the shot, so I want to control the iris on all three cams from my location.

I am looking for a controller that can do this. I talked to Phil at Grizzly and he has what I need, but I don't need half of what he has to offer for $3000, (zoom, pan, tilt, focus).

Does anyone have an alternate method of remote controlling the iris?