Thanks, Ethan. Looks like they have those densities available through Roxul. I went into the store, and the guy at the counter knew exactly what I was talking about. At some point he had installed leftover sheet mineral wool into his house to soundproof it. He said it made an unbeleivable difference. As soon as they get back to me with prices/availability, I'll post the information in the local suppliers thread. For a while there, I though I was out of luck because I live in the middle of nowhere
