The store selection is small (thats the same with most stores) compared to looking online where you'll find more. Just be sure you read the description so it fits your model. Walmart online carries others from different vendors to make sure you get a full selection to choose from. If you prefer just walmart there should be a way to filter that. Either way, yes they carry them.
They have both... Its just a small selection
Yes. Both.
Yes to cases
Not sure Call them and ask for the electronic dept.
Thanks! Your answer is awaiting moderation.