AKAtheCentimetre

Hey guys... desperately need help finding a piece of music I hope to use for a video. I don't have anything specific in mind (i.e. I'm not looking for a piece of music that I've heard before but forgotten the name of), but here are a few things...

I'm looking for something to use for a trailer I'm thinking of making (for anyone who's interested, it's my idea of the Doctor Who Time War). I've been trying to find a piece of music that is about 1 to 2 minutes long, preferably classical or at least instrumental with no vocals that are actually words. As I said in the subject line, 'apocalyptic' is the adjective I was thinking of; something loud, awe-inspiring, and hopefully scary. Just as an example, the kind of piece I'd like to get hold of would be something like Klaus Badelt/Hans Zimmer's music in the Pirates 3 trailer (which can be viewed at various places round the net).

Suggestions? Anything would be helpful - thank you!