I don't think they are NOS, but they are in great condition and don't seem to have been on a car much, if at all. The plastic is slightly out of round, but it could be persuaded back with a hot air gun because it is very soft.
There are a pair of clips at the bottom, but they do not appear to align with the edges of the headlight'doors' or the front of the fenders. We don't know how they are supposed to fit or what they are supposed to fit! So you might have to be a bit'creative' fitting them - but if you do, you will have a unique item that will probably be unique in the world and will be a show stopper.