If you absolutely must have an original equipment manufacturer radio antenna for a particular car, then the best way to do this is to use a junkyard network website such as www.car-part.com. These sites allow you to specify exactly what you wish and if they have it, then they will quote you a price, and if you buy it, they will ship it to you.
I'm pretty sure you can.
Yes. They have many retrofit types of antenna.
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