What ringtone is the "No ringtone selected" tone? If not in list, how can I get it?

I noticed recently that I deleted the tone off my memory card I was using and my Droid defaulted to a completely different ringtone. The problem I have is nothing in my ringtone list is selected at all, so I dont know which tone it is, but I like it lol. Its a really regular unique ring and I would like to have it other then simply deleting whats selected.

Anyone know what this tone is or where I can grab it? Maybe someone with a rooted device can rip it out?