New PENTAX D-BG8 Battery Grip for K-3 Mark III Digital Camera 4549212302527 | eBay
D-bg5 Battery Grip For Pentax K-3 K3 K-3 Ii Dslr Cameras - Battery Grip - AliExpress
Non-rotating Arca-Swiss plate: Pentax D BG5 grip (5PRAJ5PQY) by drlightx
Amazon.com : Pentax D-BG5 Battery Grip for K3 Digital SLR Camera (Black) : Electronics
Amazon.com : PENTAX Battery Grip D-BG8 Black for Pentax K-3 III Flagship DSLR Dust-Proof and Weather Resistant Construction with Capacity to Hold Additional D-LI90 Battery (37048) : Electronics