It looks like this answer is converging on a conclusive answer about a zenith-facing window on the ISS, and possibly also a window which might at least be able to offer a bit of a view of the zenith.
It would be really really nice to find a photograph of the top side (zenith size) of the ISS - the side that sees the stars, opposite from the side facing Earth.
Were there any shuttle missions that passed slowly over the top of the ISS, or at least had a view of the top? If so that might help narrow down a search for photographs of the top of the ISS by limiting to a few missions.
An actual high resolution photo of the top would be really great, but just the name of one or a few most likely missions would be good enough.
These would need to be after the Zvezda module was added and up and running. There is one window that is interesting there, (discussed here) so it would be great to see it!
Ultimately I'd like to be able to verify the existence, some more details, and angle of "window #13" as described here as well as check for any others. This gives an idea of the kind of resolution I'd like to find.