Lisa those plugs are a standard plug, I would look online or ding and old computer cord or serving that used that same plug. But walmart has the 3 prong not sure if it's instore, I have a bunch of them because I install TV's and security systems but power supplies to other stuff use them same plug. Just trying to help you out so you don't have to buy one you may have one or a friend may have one laying around..
I would suggest looking online first.
That might be an online purchase...not sure if they carry in store.
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