Recovering a bad flash is quite hard and sometimes require a lot of luck. The Bios file from the website is correct you just have to rename it to .ROM to change the extension on the bios file. I don't know why Asus choose to name their bios files .(whatever version the bios is)
I don't think the web version is enough. From what i have read, the BIOS file from web site is just a part of it.
And RMA is not a option.