The Sorcerer's Legion army that I have was produced by Mongoose. I am not sure if Rebel Minis plan to rerelease it.

The army is available on ebay from several ebay stores.

It includes the Sorcerer, 4 units of Mutant Followers, 3 units of Demonic Warriors, and 3 units of Winged Demons. Blister packs are available for teh Demonic Avatar (a huge figure), and the Witches Coven.

It can be a difficult army to play as all of the demonic units are summoned.

The army reference sheet is available for download from Board Game Geek.