I do not believe that these exist in legitimate games. I believe that they are files which were left out of the game but left in the save files like the Grenade Launcher, Draco, and many other things.
I have personally collected a number of these loyalty class modes from Crawmermax loots. They are removed from inventory due to a game bug when you start a new game. They do work for the duration of the game. If you examine your safe file before restarting the game, the item is listed in the save file, but it is erased upon start of a new game.