Fatwah on Western Digital
I've found several that I prefer to the stock options. For those interested, it comes with a 15 minute refund window.
Actually, once I dug into the APK, it's about 35MB of .ogg files plus a tiny little binary for previewing and setting them as the system alarm/ringtone/notification. When I just copied the .ogg files and stuck them in /storage/sdcard0/media/audio/notifications on another device they show up like any other system sound.