Splintered Light has a great selection: http://www.splinteredlightminis.com/ Nice people, too!
Khurasan has some neat offerings, but they seem to spend much of their time closed these days. Ooh, just checked – they’re open! http://khurasanminiatures.tripod.com/ Their Cthulhu-ish items would fit well into the Hyborian eldritch horror theme.
So there’s a start. Let us know how you get on. And post piccies!