Amazon.com : Pentax D-BG5 Battery Grip for K3 Digital SLR Camera (Black) : Electronics
Pentax K-5 Kit 16-megapixel mid-size digital SLR camera with 18-55mm kit lens at Crutchfield
Amazon.com : DSTE Replacement for Pro D-BG4 Vertical Battery Grip Compatible Pentax K-7 K-5 K-5ii K-5iis Digital Camera as D-LI90 : Digital Camera Battery Grips : Electronics