The legal and recommended method to obtain this file is to dump it directly from a physical, retail SCPH-70012 PlayStation 2 console that you own. This process involves:
An emulator allows your computer to behave like a PS2, but it cannot legally include the original Sony software that runs the console. The BIOS defines the regional behavior of the console—Japanese, North American, or European. ps2 bios scph70012bin top