My friend had to restore her Windows laptop last month, and today her iPhone 4s. Her purchased ringtones are no where to be found. Where do you re-download ringtones? Her iTunes library (latest version of iTunes) has nothing under "tones". Also checked under "purchased" and can't find them there either. She has an email receipt from March for one of them.

Make sure she's signed in to the account used to buy the ringtones.

I seem to remember having that problem too a while back. Something happened to a couple of my purchased ringtones and if I recall correctly, unlike songs and apps, there was no provision for re-downloading them. Not sure if that has changed or if there is some less than obvious way. However, in my case it was money gone.

She may try giving Apple a call, or stop at the Apple Store.