GameScience makes them, though they're a tad expensive (and difficult to locate on the company's new website). They have them in tiny dice ("microhedra") and normal-sized dice.
EDIT: Link. GameScience site, D20s.
GameScience makes them, though they're a tad expensive (and difficult to locate on the company's new website). They have them in tiny dice ("microhedra") and normal-sized dice.
EDIT: Link. GameScience site, D20s.