Dantooine: Courtyard: Cassus Fett's Armor
When you get to the third Jedi trial, you will see a merchant near where the Kath Hounds first ambush you. Talk to the merchant that sells armor and weapons. Ask to see his stock and you will see Cassus Fett's Armor. It costs 15,000 credits. Note: You will no longer be able to get the armor after you are taken prisoner by Saul.