Lieutenant Pierce Customization 6
The Lieutenant Pierce Customization 6 is a Belsavis Companion Customization Vendor (Imperial) 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.
Lieutenant Pierce Customization 6:
Original Lieutenant Pierce:
How to get the Lieutenant Pierce Customization 6
The Lieutenant Pierce 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 Belsavis Companion Customization Vendor on Imperial side is located very close to where you load in. The vendor is a silver droid named R-N05 standing in front of a market stall. The quickest way to get there is to use the Belsavis heroics quick travel (otherwise just fly there on your ship). You'll likely be able to find this customization at the Imperial Ilum planet customization vendor as well.
This customization can also be purchased on the Republic side from a vendor called Keltas Gurn, Companion Customization Importer located in the Cartel Bazaar section of the fleet (northern elevator, there's a quicktravel point there). The vendor is inside a shipping crate.
Lieutenant Pierce Customization 6 zoomed out:
Original Lieutenant Pierce zoomed out: