Yes, the Trimble aviation GPS receivers are now FreeFlight. They have
been working on a GAMMA 3 TSO C146a receiver. I am not aware of a
expected certification date. It will be significantly less expensive
than the only other C146 receiver, but will lack fancy features such as
COMMs, NAVs, and a moving map display. They key feature will be it's
ability to use WAAS enabled procedures such as LPV.

Brad