Yep, that's a quirk of their site, that you can't directly link to images. They also usually don't sell images to individuals, no matter how much you're willing to pay them. Their business on the image licensing deal seems to be with books, magazines and other "volume" items.
At least SDASM has a lot (though not hardly all) NAA images from back in the day, though I'd bet that Boeing's Archives (and some others) have more and in even better quality.
And, no, SDASM doesn't have this image to my knowledge.