Hi Jaqueline, yes I've tried Kernowcraft, PJ Beads, International Craft and every other supplier I can think of. They all only supply the standard cabochon size settings. I've made some resin cabochons that are 25mm round & I can find the settings I want in the USA - I'm sure someone in the UK sells them, but I just can't find them

I suppose I could make my own with silver clay but I was hoping to be able to buy them - lazy, I know!