To get the AE ISO file, go to Emuparadise, browse the MAME section, download the CHD image file, use the CHDMAN app included with MAME to extract a RAW file and rename its extension to ISO (it is actually an ISO file). That's how I got my ISO file.
Hey man! I have a request for ya. You worked on bringing SC3AE to the PS2 but the torrent is now dead. Now that everyone can get the game (I'll explain how later) could you please make a guide to do what you did, if you really can't reseed it?