just to make sure you know what you want... are you after the large logo retaining 'pins' that go through the lense, through the gogg frame, and then have the ear pieces lock into the far side. orrrr, are you after the teeny little clips that stop the ears from wiggling up and down?
if you're after the large retaining logo 'pins' then i have a set for sale... and if you're after the little locking plastic clips, then, i don't believe you can get them as spares, and everyone i know with events has lost them and continues life without them, quite merrily