iPhone text tones

So this is a bit of a different question. My roommate wants a shorter tone for his phone for incoming texts, but all the standard sounds he's got suck (surprise?). The iPhone may not have anything special, but the bell and glass sounds aren't too bad. My question is whether anyone here might know where I could procure either of those, I've been looking unsuccessfully up to now and thought I might ask. I haven't jailbroken mine or anything, otherwise I'm sure I could get it there, anyway any help would be appreciated.