I bought mine through Amazon.
Yes, they're sold , as to in stock , I'd suggest going on their website and select store pickup if that's your choice. Plus your selection will be broader.
They used to carry them but their computer section has gotten smaller and smaller until they only have a few cables and misc stuff. You are better off going down the street to Best Buy. They will have what you need. And the best price.
Carry both
Don't know if Walmart carries either of those.
Go to the Land Line phones are. They are in that area.
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