Four new Pixar Coco MagicBand designs have appears on MagicBand On Demand kiosks in Walt Disney World. The kiosks are at Disney Springs, Hollywood Studios, and the Magic Kingdom. Coco did have a Limited Edition MagicBand a while back, but it sold out almost immediately and was very popular. This should allow people to grab a new Coco band without having to pay and arm and a leg on eBay. The four bands feature Hector, Ernesto De La Cruz, Miguel, and Dante.
These MagicBands are not available online from Disney (they are only in the theme parks), but you can buy it from eBay online by clicking this link which will take you right to the product listings.