ESSTAC has made a name for themselves with their hybrid Cordura/Kydex pouches. ESSTAC is known for great quality and fantastic modern shooter solutions.
GP Pouch specifically meant to hold Dual Tube / Binocular Night Vision Devices. This pouch as a Tegris insert for regidity and protection.
While not designed to hold extra accessories, some bodies may allow room for more. As pictured in the second photo the Photonis Vypers leave room for a COTI.