I have a D600 with a RRS L-bracket which makes plugging in anything into the ports on the side of the camera impractical in the field. It looks like most, if not all, GPS units plug into one of the ports on the side. Does anyone know if there a GPS module available for the D600 which mounts on the flash socket on top of the camera without any connection to the side of the camera? My Pentax K-5 had this option but I am not sure about Nikon.