Amazon.com : Neewer Professional Vertical Battery Grip Replacement for Nikon D3100/D3200/D3300/D5300 SLR Digital Camera, Works with 1 or 2 Pieces EN-EL14 Batteries : Electronics
Vivitar Battery Grip For Nikon D3200/d3300, 1 - Kroger
Nikon MB-D3100+ for Nikon D3100/D3200/D5300 (with Remote) Battery Grip – Wasabi Power