The opposite of the Repeat Customer achievement.
Don't give Jo any scrap. When you get to R&D and find her little hideaway, the sunglasses will be on a desk to your left.
If you're having trouble locating her room, as soon as you enter R&D, you'll come to a spot where the path continues left, and in front of you there is a partition with boxes on the right. The area will be called, "Pressure Control."
If you gave Jo scrap, you'll have to do this on another playthrough.