Try browsing the Audio Portal under Heavy Metal. Try sorting by Author or Date. This might take a day's worth of browsing, but pick two or three stand-out tracks, or tracks that were made recently, within one year.
Once you have a few metal musicians singled out, check out their profiles, write some PMs about your idea, and follow up if they reply. This sure as hell beats writing a single post in your profile about the subject because the odds of a musician seeing this is next to nil. If you want a commercial project done right, you got to learn how to network.
deny595
Here's some awesome suggestion of bands
Arch Enemy
Megadeth
Metallica
Anthrax
Slayer
Slipknot
Dethklok
Static X
System of a Down
Disturbed
Get Scared (New Band)
Krypt (Satanic Black Metal)
Dimension Zero
...
So yeah thats all the bands I can name FOR NOW!
I have plenty of more just look up my youtube channel it's just a bunch of rock metal alternative and shit.
TREEhuginKiD