Hello, dear /tg/.

I need some assistance. My friends and I are running a campaign in the Sandman universe (d20 system). Some of the PCs are detectives, actors and journalists, normal humans who doesn't know almost anything about the great mysteries surrounding us. A few others are minor immortals, long-lived humans with mystical knowledge. We're taking extremely caution to not mess with this universe, so here I am asking for help.

The thing is, the PCs will face and confront the Furies ( the most terrific aspect of the triad of witches, Hecateae, who destroyed Morpheus). Any idea how to stat the Furies and place them in the story?