Asking for direct links to bios files is prohibited here. This since technically it is illegal to have the bios. What I can tell you is to go to google.com and do a search for PSX Bios. You should find several sites that have them. If you were to continue to ask for a direct link to the bios files, you could be banned from these boards.

Not that you are going to be banned for asking this time, just an FYI for the future. Now I am going to close this thread.
sincerely,
sx/amiga