Just noticed that a New Disney Exclusive 3.75-Inch Droid Factory R4-BOO18 Halloween Droid has been listed on the Shop Disney Parks App and website. The "Add to Bag" and "Order Now" buttons are active, but upon checking out you currently (as of this post) get the following error:
"Item Unavailable - Sorry Star Wars R4-BOO18 Halloween Droid is currently not available"
Hopefully sometime later on today it will allow you to order it.
UPDATE: You can now place orders for this Droid as of 5:45am CDT, while supplies last on the Shop Disney Parks App and Website.
Also available at ShopDisney.com, use promo code "HALLOWEEN" for free shipping.