Thak you for those quick replies.
Yes, I did have a quick look at the RTC modules with the back up batteries. At $21 also much cheaper that a real Davetron 850 at $400.
As for the simulator, it does display the time on a monitor, but there is no way of getting that info into the real world from what I understand. FSUIPC is used to interface switches, pots and rotary encoders, even radio frequencies can be displayed on LED displays. The clock does not appear to be accessible. One option would be to buy an LCD monitor small enough to fit behind the front panel.