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Brian Gavin Diamonds makes bezel set studs, you can select your stones, and they custom make the bezels. Here's the whitegold bezel stud part, then you select the stones separately. These would be made to order and you could pretty much get any size stones you wanted.
If you just want a tiny set, they also have these preset ones in white gold with the stones included:
http://www.briangavindiamonds.com/diamond-earrings/studs/pre-set-bezel-studs-18k-white-gold-5659w18