Found this recently while looking for better than what Saitek offer for their LCD FIP's software gauge wise, Saitek only offered very basic ones at first and then added some slightly better ones but still left a lot to be desired IMHO.
http://fsxtimes.wordpress.com/ Click on the hardware tab and drop down to gauges/gauge collection for FIP's.
You'll need to subscribe to the guys blog and send a request for the gauges if you want them, the guy is open to requests for gauges if you have anything specific in mind but no guarantees ... instructions on how to install them are on that site