Where can I buy an MP4 file?

[Groundhog]

Okay, my younger brother's birthday is coming up, and one of the presents I'm attempting to get for him is a movie for his Sansa Fuze. Specifically, The Phantom Menace. The trouble is, I can't find a reputable site to buy it from. Do any of you know where I might be able to buy it as an MP4?

[Flarp]

I believe iTunes uses MP4.

Also, off-topic, commiepuppy is COMPLETELY AWESOME.

[Groundhog]

Yeah, already tried iTunes, since I've got an iPod. Unfortunately, stuff bought from iTunes only works on iPods, and my brother has a Sansa.