As for the chunk loading turtle, there already is one in
MiscPeripherals.
As for the ender turtle, the mod was discontinued due to it being overpowered in nature. In public servers, this could become a major problem where turtles are rigged to steal from ender chest inventories. In any situation, the ability for turtles to freely use an ender chest inventory is overpowered because you could go on to the next ender chest when you run out of room and have near infinite space, despite if you add a cost. The idea is just not realistic.