No. It's not an item, it's an armor type (like Plate Hauberk or Full Helmet etc) that some creatures have. The EA T'ien Ch'i summon Demon of Heavenly Rivers, for example. The armor gives 10 protection to both body and head the same way the Bracers of Protection do.
I believe one of the four armed Pretender chasis (the one with fear and blood magic whose name I cannot recall) comes with it as well. I assumed it was just an odd type of chest armor, though, and not a miscellaneous item that boosted protection across the board.