Nadia Grell Customization 6
The Nadia Grell Customization 6 is a Ilum Companion Customization Vendor (Republic) item which can be found in Star Wars: The Old Republic.
To get this companion customization, simply go to the planetary Companion Customization Vendor and purchase it.
Original:
Nadia Grell Customization 6:
Original Nadia Grell:
How to get the Nadia Grell Customization 6
The Nadia Grell Customization 6 is a customization you can purchase directly from a vendor in-game, you don't need to purchase it from another player and there's no secret way to get it. All you need to do is go to the vendor and buy it, and most companion customizations only cost between ten thousand and twenty thousand credits.
The Ilum Companion Customization Vendor on Republic side is located on the main floor of the Ilum base near where you load in, in the Cantina, and for some reason this customization can only be found on Ilum... unlike the other customizations which are found at multiple vendors. The vendor is named Sergeant Koam, and is a blue Mon Calamari.
Imperial Side
This customization can also be purchased on the Imperial side from a vendor called Denvas Ran, Companion Customization Importer located in the Cartel Bazaar section of the fleet (southern elevator, there's a quicktravel point there). The vendor is inside a shipping crate.
Nadia Grell Customization 6 zoomed out:
Original Nadia Grell zoomed out: