Saw this item at Panasonic forum and clicked around to find this for the K100D
http://www.gadgetinfinity.com/product.php?productid=16805&cat=283&page=2
Probably the connection would be similar to the Panasonic user review here http://forums.clubsnap.org/showthread.php?t=309402
K10D one is here but dunno if the connection are thro wires or like the original Pentax grip.
http://www.gadgetinfinity.com/product.php?productid=16835&cat=283&page=2
http://www.gadgetinfinity.com/product.php?productid=16805&cat=283&page=2
Probably the connection would be similar to the Panasonic user review here http://forums.clubsnap.org/showthread.php?t=309402
K10D one is here but dunno if the connection are thro wires or like the original Pentax grip.
http://www.gadgetinfinity.com/product.php?productid=16835&cat=283&page=2