Thanks guys, I can see the MOP dots for sale in the UK & also some gold mother of pearl on Amazon but I really wanted "shiny" gold like the frets themselves!
Brass might work but a bit more trouble making them up... I am surprised there are so few option's available!
I was wondering about a metallic pigment in some epoxy but really, I hope to find something ready sized and available.
Perhaps a visit to a craft shop or even a jeweller (I do have a spare wedding ring)