You can browse your squad members' saved lookbook slots, and shop directly from them, similar to “get this look” from Show Your Style. They can shop from your saved lookbook slots too. Missing something you’ve wanted for a long time? Find one of your friends who has it, get them to save it to a lookbook slot, and go buy it!
Within the squads menu, tap on the members tab on the left hand side, then tap on lookbook for the member whose looks you’d like to view. This will bring you to their saved looks. Happy shopping!