Custom Dice

Chessex offers custom six-sided dice in relatively small quantities here.  Not too economical for a small run (a fully custom die with all six sides would be $6 per die up to 25 of them, with a minimum order of 10 or $60, and not too much of a bulk discount at $2.52 per die at 500 of them, a total order cost of $1260) but maybe worth it for prototyping or small-print-run hand-made games, especially if you only need custom sides for a few of them.