It's $25 and can be mail ordered directly from
Garmin (not an endorsement). I have one and it is well worth the money. I do not think there are any free and legal versions out there. You can set the thing to run on dual monitors, pfd on the left one and mfd on the right one, and it works well. It helps to have a good joystick and throttle, but I think you can get by with mouse only. While you are at it, download the
free G1000 Pilots Guide. The place I rent G1000 airplanes does not supply this book with its fleet, preferring simply to give out the smaller "G1000 Cockpit Reference Guide" which is wholly inadequate in my opinion.