Here is another possible recommendation -- Columbia Black Chaos. On the surface, it doesn't sound like a close match on paper. I found that the Black Chaos is more aggressive than the Eruption Pro, but not by much.
I switched to my Black Chaos last night in the third game burn, and the reaction reminded me a lot of the Eruption Pro. The two balls come with the same factory finish (500/1000 w/Powerhouse Factory finish), and for me have similar hook shapes.
I'm going to throw the 2 balls side-by-side this weekend to make sure I'm not blowing smoke.