Backseat Dane. That, from an avionics standpoint is doable. You could go A/C on the transponder, or it could be re-strapped in the air to a new ICAO code. I won't go into details on re-strapping it but it would only take 5 min top for an avionics guy. But I would want a test set to make sure I didn't screw up the code.
Maybe we should be playing the ball (the aircraft) and not the player (what happened)
777 drivers. Assuming your running on fumes, 230 pax and luggage, what is the minimum you would need to land and do a full stop? No safety margin or book approved field distance, just assume 0 Kts wind. And assuming you offloaded the pax and luggage, how much to take off again with say 3 hours fuel.
Is there any area in the northern track that would meet the requirements? Abandoned airstrips from WW2, dry lakebeds, etc.