Comment The ultimate bios site (Score 2, Informative) 83
Be sure to try Wim' Bios page Click the award or ami bios id link at the top and you will be directed to a page the can identify the motherboard manifacturer based on the bios id (the string of numbers at the bottom of the screen during post). Armed with that knowledge, you can then go to that companies site and look for your particular board.
It has helped me locate bios' for no-name boards many times.
As an aside, I don't know much about Asian culture, but it seems to me they must know that some of their products are really crappy and thus don't put their company name anywhere on them.
--Mike