Ashur's Power Armor

Ashur's Power Armor is a stylized variant of the T-4x Power Armor owned by Ashur, the leader of The Pitt raiders. It is aesthetically identical to Tribal Power Armor. It is not with the story of Fallout 3 as the Brotherhood of Steel finds unused power armour in the ruins of the pentagon after they left Ashur to die. So were did he find one?