If Lightroom thinks that they have already been imported, then you are not doing anything helpful by trying to import them again. You need to figure out why Lightroom is telling you that the photos have already been imported.
Assuming that Lightroom is correct, that the photos have already been imported, then you must reconnect the photos using these instructions: Adobe Lightroom - Find moved or missing files and folders
Are they, did you, already import them at one time? That is why they are grayed out, they are already in the catalog.
Thanks both, after much head scratching as to where the original images were and Spotlight failing to point me in the correct direction, one way or another I have them in the correct place.