Star Wars: Galaxy’s Edge opened officially today in Walt Disney World, and select exclusive Cast Members on the Opening Team received a boxed MagicBand as a special gift thanking them for their service. These are limited but the amount is unknown. They can’t be purchased and there is no SKU for them. This is considered a promotional item.
This MagicBand are not available from Disney online, but you can buy it from eBay by clicking this link which will take you right to the product listings (if any are available).