Did just manage to find these:
http://toys.brando.com/horrible-skul...8c023d019.html
http://toys.brando.com/horrible-skul...3c013d001.html
Look at either of those pages and you'll see the site is constructed just as well as the Secret Ghostdoms themselves.
Also, it's apparently available on Amazon:
http://www.amazon.com/Horrible-Skull.../dp/B004JZD0D6