Rent a Nikon MB-D15 Battery Grip for D7100/D7200 | BorrowLenses
Kirk BL-D7100G L-Bracket for Nikon D7100 with MB-D15 Battery Grip - Ace Photo
Nikon D7100 w/Nikon MB-D15 Battery Grip: For Sale and Wanted Forum: Digital Photography Review
Neewer® Vertical Battery Grip Replacement for MB-D15 Works with EN-EL15 Battery or 6 Pieces AA Batteries for Nikon D7100 D7200 Digital SLR Camera – neewer.com
MB-D15 Multi Power Battery Pack - Allen's Camera
Nikonites
Jupio MB-D15 Battery Grip for Nikon D7100 and D7200 JBG-N013 B&H