Pentax D-BG4 Battery Grip For Pentax K-7 and K-5 Cameras 39846 £89.89 |London
Pentax D-BG 4 Battery Grip for Pentax K5/K7
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
My K-7 Is Now Complete (D-BG4 Battery Grip Review) - PentaxForums.com