As of today, there is no RFH lockdown procedure for the TRX. That's directly from a ram manager, who was visiting when i was last at my dealer last and they had a rep there I was lucky enough to speak to. Take that for what you will.
It costs them nothing to do, my guess is that the profit margin on charger/challenger alongside the volume of those vechicles and their theft percentage, warranted the "warranty time $" to be paid to the dealer to flash the cars.
In our case, i think both the volume and theft percentage are much lower, and therefore they dont want to spend the money. Its always bottom line..