Hi Paul,
Sorry mate, don't have the facility to look up vehicles that have left the service, just ones that are in service. It was more out of curiosity. KJ plates covered mainly 2.5 n/a diesel defenders with the army and a few V8's from the RAF. I'm not an expert though and to be honest, the forces had no real method to their registration of various types and models of landrover.
Cheers,
Gaz.