There is at least one set, black and white, that the restoration team has been using for decades. You can find copies of the images in most books and articles; I assume they’re online somewhere as well.
One of the great lost treasures of humanity. Almost certainly burned, despite wishful thinking.
The photographs of the original do seem to be rare online, although some of them can be found on this blog.
Part of the issue will be that the pre-war photographs were only black and white. This caused problems for the restorers, who went to great lengths to work out which shades of gray corresponded to which shades of amber when using photographic film of that period.