I think you could write one in Python. You can create it in the inventor as done here:
Then add a function processNoUSB() which will allow your module to run headless, and in there just do nothing.
## Process function with no USB output
def processNoUSB(self, inframe):
See here for details: http://jevois.org/doc/ModulePythonTutorial.html
now you can try things like
setmapping2 BAYER 88 72 1.0 You YourModule
Alternatively, what is wrong with just issuing a streamoff and keeping whatever module is already loaded? That will idle the camera sensor and it might give you the lowest power usage, but you can compare with the above to see which one is better.