Head on out of the Rave. You have information to find the suppliers now. They are nearby Pilgrim Station.
Go into the Libuse Apartment and then take the stairs on the left. On the floor up, turn to the left and go to the door with the Neon Swan on it.
You can hack into the apartment using the keypad next to it. It has a security rating of 2.
Inside the room, turn to the left and look for the Spray Bottle. Interact with it.
This will reveal a door next to the bottle. Go inside it. You will see a safe. It has a keypad on its left-hand side. It has a security rating of 4. If you have a Multi-Tool.
Inside the safe you can find a Pocket Secretary that will tell you more about where the Neon is coming from. This will begin the final stage of the mission.