There is a button to purchase the ornament ornament on the web page below (highlight the link, copy, and paste in to your browser): https://www.holidayfestivaloflights.com/ornament
They only sell it at the park so that it's exclusive to attendees.
You would have to call the park to see if anyone is selling the ornament besides the park. It isn't available for purchase online so that isn't an option.
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