It's a door lock rod clip.
http://www.dormanproducts.com/c-277-...rod-clips.aspx
http://www.dormanproducts.com/p-1236...0Lock%2520Clip
Look through the Dorman site, if they do not have it, it most likely is a dealer part.
You can usually find the clips in most auto parts store on the 'Help' rack.