Is the one OB posted what you're looking for?
You can try using the Google search from the drop down. Or just use this syntax in Google search in Chrome's address bar or on google.com:
replacement key online dealer site:xoutpost.com
Edit: I see you can't find the valet key. Using the above technique for:
part number valet key site:xoutpost.com
Found this which appears not to be the plastic key:
https://xoutpost.com/1080927-post20.html