Who repairs and/or replaces battery on an iPod?

I have 2 old ipods. I don't know what generation they are (or how to find out). All I know is one is thinner than the other and both are old. (One has 80GB-thicker one - and the other has 160GB.) Both need the battery replaced and one (the thicker one) has something loose and rattling around inside. Who repairs/replaces ipods? The only one I can find is Parts Plus Pods (in Australia) Who else does this work?

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Where do you live? Are you in Australia or somewhere else? What major city is near you as well.

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I am in the U.S. in a town just outside of Nashville, Tennessee

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