I think that this is what he's asking for. He's asking where they are located specifically, not the idea
of WHAT type of people to contact, but exactly WHERE they are.
I've had MC's reach out to me and went from there. But I also check out blogs and bandcamp quite a bit, and if I find an artist I really like, I contact them and propose working together.. You're always better off working alongside artists as opposed to just feeding beats to randoms I find. Then again, I'm not famous yet so what do I know?!