The seat heater switch would work! It is a rocker front to back with central neutral. The front position could be NAV VSS on and the central position off (for input) and the rear position camera on!
This is an image of the aftermarket switch for the fog light sold by the Zstore
These parts might work though. They are the factory seat heater switches.
http://www.courtesyparts.com/370z-pa...8759_8763.html
If not, then these:
at this web store
http://www.wiringproducts.com/