Eric,
You said you're using motor type machines. Are they stall-motors that stay on continuously with power, like a Tortoise?
How is the DPDT wired, like a track reversing section?
If the answer to both is yes, the switches could very easily be chained together in that case (you wouldn't be able to use centre-off though) - but the position of the toggle on either control panel wouldn't necessarily correspond to the actual turnout position. Pushbutton throws would start to be a better idea and you'd have to use LED/light indicators on the panel to indicate position.
Either way it should be doable, but I don't know how the switch is wired to control the motor in your particular case.
Also, last year MR had an article about dual-controls for tortoise switch motors which might be handy for you. I'm not sure exactly which issue it was though.