Nextel Ringtones

Not sure if this is the right forum–mods, please move if I’m wrong.

Can anyone help me find ringtones for a Nextel i60c phone? Is it even possible? I’m hoping not to pay for it–it’s a monthly bill if I have to pay, correct? I’m not so desperate for a ringtone that I’m willing to pay more than once for it. (Yeah, I’m cheap.) If anyone’s feeling particularly ambitious, I’m looking specifically for “Mambo de Chocobo” from Final Fantasy, but I don’t expect anyone to provide anything more than a website I could browse.

Many advance thanks!