Vello BG-N8 Battery Grip for Nikon 300/300s BG-N8 B&H Photo Video
MB D10 Battery Grip+ AA Battery Holder+ EN EL3E Battery Holder for Nikon D300 D300s D700 SLR Cameras.|battery grip|battery grip for nikonbattery grip nikon d300 - AliExpress
Travor Professional Battery Grip Holder for the Nikon D300 D300S D700 as MB D10|battery grip|battery grip for nikonbattery grip nikon d300 - AliExpress