The sixth wave of the current series of Kabaya Transformers Model kits is a set of three Fortress Maximus parts, and is scheduled for release this month... so might already be out now that images have been found.

Note that the three parts are individually their own mini-battlestations that can form Fortress Maximus in all three of his classic modes, plus each part comes with a small Transformers character as well - Powerglide, Windcharger, Cerebros.