Why don't you put a GPS tracker on the RC Aircraft. I have been using Trakimo for years on my drones which has saved my drone several times. Just follow the app to tracker.. The new 4G version is super accurate.
I've had great results from DJI repair service. In fact, DJI seems more reputable than the folks trying to put them out of business here. Sadly, we can't compete so they figure if we can't lick em..stick em.
I have found DJI Customer Service to be incredible!
Currently I have an Avata 2 in under Care and DJI is trying to honor their end of the deal. The current Border and Customs problems are holding up my replacement though.
I did buy an Avata 2...