Last I knew, the Body Shop did not sell essential oils, they sell fragrance oils. They might be labeled "aromatherapy", but fragrance oils are not aromatherapy. Most big shop sell products that are labeled as aromatherapy, but are not.
Online is really the best place to get good essential oils, but since you don't want that, a health food store woud be your best bet. Even large ones such as Whole Foods usually have an aromatherapy section. Look for "pure essential oil" on the label.