30 pin to USB iPhone cable (Lewisdale Rd., Clarksburg)

We have an iPhone 4 from an old friend that we're hoping to turn into a dedicated music server, and we need a 30-pin old iPhone cable in order to transfer files and factory reset it. If anyone has an old 30-pin iPhone cable that they'd like to get rid of, please let me know.
Can you help with this request?
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