Eureka release 28mm Turtle Tank
From their website:
Even the bravest Warrior Frog will hesitate when confronted by a Turtle Tank with its towering multi level armoured howdah, bristling with spikes, and crewed by a highly trained elite Terrapin crew armed with lances and swivel guns.
This is an easy to assemble white metal and resin plastic model which comes complete with swivel guns, a banner, a War Turtle Captain, seven fighting Terrapin crew, and a mahout. (Some of the crew figures can be obtained separately for further customisation or other employment in the Turtle Army)