Welcome to the forum and congratulations on your car. There are two key tools that will be invaluable to your ownership. At the top right of the forum page is button labeled "Search This Forum." It will help you draw from the experience of many owners over many years. Then there is RealOEM.com. It provides an illustrated parts breakdown of your car and similar models.
There are several threads here on both keys and remote systems. You can consider what approach is right for you. I believe you can retrofit a remote system from the later models.
The entire mirror and/or component parts are available. Go to RealOEM.com, decide what parts you need, and then go to one of these suppliers to buy it: