Somborn Weapons Crate ( -819, 7, 22 ) /waypoint -819, 7, 22 It's in the Bummer Gang Camp near Wayunder Lake.
Somborn Tools Crate ( -454, -16, -154 ) /waypoint -454, -16, -154 It's in a Bummer Gang Camp near the river.
Somborn Medicine Crate ( 152, 46, -330 ) /waypoint 152, 45.55, -330 It's near the Reconstructed Ulteran Spire in a broken wagon. Be careful of the gremlin trickters and muses (lv 63-64). They will swarm you if you go for the crate, but can be picked off one by one if you can't handle them all together.
NOTE: The crates have a respawn time of about 15 seconds.