Sometimes the firmware update doesn’t work when ran on a Mac but doing it from Windows does. Have you tried that? I know it sounds dumb but some people have had luck with that. You might be able to find a matching board on Ebay but opening the drive voids the warranty. This explains a bit about matching the boards http://community.wdc.com/t5/Off-Topic-Discussions/Bridge-Boards/td-p/353839
Joe
