Elio, to answer that question we need to know which component the current keys were matched to. Remember, the RFID transponders can only ever be matched to a single immobilizer ID, so you MUST preserve that in whichever component is functional.
If that's not possible, you will have to replace the transponders.
You are totally right as usual Daz. The info that I have is that current key is matched to it car and it cluster, the one that I have.