Complex sentence: Forrester Creations bought many of the boutiques in LA except for Fenmore Department Stores and became the only major buyer except for Lauren, until Forrester Originals opened their own line of boutiques.
Split into simpler sentences: Forrester Creations bought many of the boutiques in LA except for Fenmore Department Stores. And became the only major buyer except for Lauren, until Forrester Originals opened their own line of boutiques.