In Search of Zarathustra: The First Prophet and the Ideas That Changed the World By Paul Kriwaczek. In it, Kriwaczek strongly claims that Gnostic forms of Christianity (including Gnosticism in the 1st-2nd century AD, Catharism, Bogomilism, and Manichaeism) are all continuations of Zoroastrian dualist beliefs.
‘Gnosis On The Silk Road’ by J-H Klimkeit is about and contains texts from Asian Manichaeism, a 3rd century Gnostic religion which very explicitly used Zoroastrian terminology and names in it’s complex system. I don’t know how much of this filtered into the western branches of the religion which Augustine practiced in North Africa. But the Zoroastrianism is firmly embedded in the eastern texts.