I'm pretty sure I've seen one for FS9, but for the life of me can't find it; even after searching on the V, AVSim, these forums and several other sites.
The only thing I have found is a Fire Fly development kit over at http://www.flightsim.com under the file name fidevkit.zip. It is designed for FS2002, but was written in FSDS 2 so it should be fine in FS9.
It's an FSC file, so I converted to Gmax to get a look at it, and it is COMPLEX! So many problems that I'm not sure I even want to get into it. Worked for well over two hours just tinkering and adjusting vertices, and only got part of one engine fixed.