A new Minnie Mouse: The Main Attraction – Big Thunder Mountain Railroad Limited Release MagicBand has been put up on shopDisney (now sold out) and released in the theme parks. The band is #9 in the series of 12 total. This band is $34.99 and the barcode SKU is 400925965086. These bands sell quickly so you may need to find them on the secondary market such as eBay.
This MagicBand is not available directly from Disney but you can buy it from eBay online by clicking this link which will take you right to the product listings.