Where can I find free sheet music for punk, rock, etc. songs?

[yukichigai]

I've had my new phone (a Siemens S46) for a while now and I'm pretty happy with it, except for the ringtones. Most of the tunes are kind of iffy, but I noticed there's a section where you can compose your own tune. I was thinking maybe I could do like my friend and program in some Pennywise or something, but I can't figure out the notes just by hearing it. Any help?

P.S. Oh yeah, I can't download ringtones like on some other phones.

P.P.S. It doesn't have to be non-mainstream stuff. I like a lot of nu rock, alt rock and whatnot. Cake and Tool... aww yeah.