Yep, there is an object named "Radio NDB Beacon" on the FMB, but as the name implies that is only for NDB
Lorenz system a different antennae set; as you said, three antennae parallel to the runway, but they where built together in the same structure: don't expect three different structures to place manually on the airport, but just one single object which holds the three-antenna system.
I hope some day it will be implemented; right now I had in mind a fictional mission which would involve Lorenz for blind landing, but it could evolve as a navigational aid for bombings like the X-Gerät back in the day!
Ok, ok.. I'll stop dreaming