I made a replacement using the MAME CHD files and it worked fine. You'll need an 80GB drive though as the MAME CHD was made from a larger than stock 20GB drive.
Does anyone know where I can find this that is not a torrent download? The harddrive died in a dedicated game and I was hoping to try and get it running with the CHD Mame file. I can't download torrents at work though.