Teeth are made of calcium enamel, not gizzard/gullet stones.
Either way, decent artists are RARE. And those that are available are more attracted to whatever style of work they like, map-making, making monsters.
Making humanoids is trickier and less creative as a process. You would be given a racial description and have to make the character model TO THAT DESCRIPTION. Not my idea of fun. Hard work. Volunteers here. See my point?