Most of the X-01 suits found throughout the wasteland only contain a few X-01 parts, not the full suit, and this largely depends on what level the player is at the time of discovering the armor.
The X-01 Power Armor can be found in several locations in Fallout 4. Should you need help with any other areas of Fallout 4, make sure to head over to our Fallout 4 guides walkthrough hub, featuring entire mission and area walkthroughs, as well as the locations of every Bobblehead in the game.