There's the Harmony Central site -- don't recall the URL, but it should be easy to find by typing those words into your search engine. It has free listings sorted geographically -- by zip code in the US. You'll find a lot of folks who want to be the next Nine Inch Nails or Alice In Chains, and precious little else. But that's probably true of most musician's referral sites (face it, we're outnumbered). Anyway, it's worth a shot.