Desktop Aviator just keeps coming out with Inexpensive Cessna Style Avionics Panels that can be easily programmed for use with your Microsoft Flight Simulators. Thay have a panel that has a ignition key switch, turn the kety to start, the Cessna engine starts turning. It also has a Rocker Switch for Avionics Power and for Master Alt/Battery.
This thing is GREAT. Check them out at: http://www.DesktopAviator.com