I've never taken any pictures of a P8A. Anything AvWeek has they either got from Boeing, the Navy, they took themselves at other locations or during a Boeing or Navy press event, or they bought from a plane spotter (like the photo below).
Here's a shot of the plane that taxied by us today on the flightline. I just now pulled it off the web. It was taken by a plane spotter--- hence the watermark--- at Boeing Field (not on Boeing property). It's one of the P8's that India bought. The Harpoon missiles are real (the plane spotter thought they were dummies) because the weight has to be accurate but they are inert.