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
Pentax K-3 II 24.35MP Digital SLR Camera with 3.2" TFT LCD Screen - Body Only - Walmart.com
Pentax K-1 Mark II DSLR Camera Body with Battery Grip Kit B&H
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
Reviewing the Pentax K-3 II: A Fine DSLR Camera for a budget price
Amazon.com : Wasabi Power Battery (2-Pack) and Charger for Pentax D-LI90 and Pentax 645D, 645Z, K-01, K-3, K-5, K-5 II, K-5 IIs, K-7 : Digital Camera Batteries : Electronics
Pentax K-3 Mark II DSLR Camera Body, Black {24.35MP} at KEH Camera