I'm hoping that the line from Batman Begins:
Originally Posted by Lucius Fox;
She was built as a bridging vehicle. During combat, two of these would jump over a river, towing cables. Over here on the throttle, flip that open and throttle up. This will boost you into a rampless jump.
would mean that Fox had the two of them built, stand by Tumbler is already sitting in a shed waiting for the paint job, would make the alleged appearance of the camo one fit in with the shooting of DKR.