Meike MK-D300 Vertical Grip/Battery Holder for Nikon D300, D300S, D700 at KEH Camera
Amazon.com: DSTE Replacement for Pro IR Remote MB-D10 Vertical Battery Grip + 2X EN-EL3E Compatible Nikon D300 D300S D700 D900 SLR Digital Camera : Electronics
Vello BG-N8 Battery Grip for Nikon 300/300s BG-N8 B&H Photo Video
Amazon.com : DSTE Replacement for Pro IR Remote MB-D10 Vertical Battery Grip Compatible Nikon D300 D300S D700 D900 SLR Digital Camera as EN-EL3E : Electronics
MB-D10 Vertical Battery Grip Multi-Power Battery Pack for Nikon D300 D300S D700 Camera Replace MB-D10 - AliExpress