Just to add Bhinaji Navi has dropped at least one QL 130 Residing Waist Symbiant, Support Unit Aban each time I've killed it.. really need that chest symbiant :/
edit:
Also drops QL 150 Surviving Waist Symbiant, Support Unit Aban and QL 120 Prevailing Waist Symbiant, Support Unit Aban. 5 kills and still no chest drop :/