Looks like Celestia and Nightmare Moon are now available over on Amazon after we posted Discord earlier today! You can either get the two as a set or individually if you're on Team Sun or Team Night.
If you're not a fan of Amazon we have the figures up for sale on Entertainment Earth as well, same as Discord!
Thanks to Illustrious Q for digging up the info.
Nightmare Moon and Celestia Set - Amazon
Nightmare Moon Individually - Amazon
Celestia Individually - Amazon
Nightmare Moon and Celestia Set - Entertainment Earth
Discord - Entertainment Earth