Where does one find a replacement rubber pad for the thumb rest on a Nikon D5000?

I have searched online and come up with no results. I don't want to spend $16 on "justanswer" or whatever it is that Nikon uses - I will need that to get the part! Is that something my local camera store would have on hand?

Call Nikon at 1-800-NIKON-UX (1-800-645-6689). If a replacement is available, they should be able to help you.