You CAN make them in the editor dude.
For example go to GD_Weap_Pistol.A_Weapons.WeaponType_Torgue_Pistol in "TYPE"
Then under balance you'll see GD_Iris_Weapons.Pistols.Pistol_Torgue_3_PocketRock et. All of the "Iris" weapons and items are the DLC 2.