Here you can download some ringtones (or alarm sounds) for your phone, which I composed. They are all in MP3 format. Click on the ringtone title to listen/download. Depending on your browser software and settings, the download may start at once, or an audio player may appear. In case of the latter, check for a "download" option inside the audio player. You can also right-click on the title (in the following list) and select the option to download.
Please then follow your phone's default procedure to install the new ringtone/alarm.