Lost nut to Nitto jaguar NJS seatpost - can anyone help?

Have lost the round nut that sits in the eye of my nitto Jaguar NJS seatpost (by the eye I mean, if you look at this seatpost from the side, it looks like a frog’s face, there is a round nut in each eye that holds a bolt the holds the saddle. I lost one of these, can anyone help me?