I have also seeked it for a long time, I asked for it at teamliqud, but even no one know it. I think it has been lost, there is only Blizzhard 1 in BWAI3.1. But for what I found, I suspect baja did not finish it, there only once had a test version with few level. Maybe you should ask baja himself at...

The lastest version that I can find is here: https://pan.baidu.com/share/link?shareid=2756646737&uk=1210517955&fid=212184489259902 and you can find a little early scripts archive at: https://github.com/Myk267/Packages and more early version exe at: http://www.teamliquid.net/forum/brood-war/5...