If you have the serials etc phone around all the local Avionics engineers and ask them to keep an eye out for it.... That way if it ever reappears on the aviation scene it will be traceable.....
I watched a prog about people nicking the gps from Ambulances even though the system could not be used in any other vehicle......... stupidity in the extreme isn't it..... one just hopes that the scrotes need one one day.......