This is the question that has been asked for years, and the string you want.....does not exist. Nothing on the market now replicates the feel of any type of ALU. Topspin Cyberflash up to 2010 did feel remarkably similar, but the formulation is new.
I would recommend you try Tour Bite if you have not yet. A good stiff playing spin monster of a string. Doesn't feel like ALU, but still damn good.