Epic Batman Battles (in the comics only)

Help! I cant find which comic featured a mini story about Batman fighting A.M.A.Z.O. by him self in the watchtower. I know a couple of you out there can help.

Plot: Batman is conducting routine maintenance on the watchtower when AMAZO appears and teleports him outside the tower into space. He makes it back using his brains but he wont call the Justice League yet. Batman wants to know if he can beat him by himself or not.

It was EPIC!!

Somebody, anybody, Help!