Live drive + 2 sound cards with the required AUD_EXT header needed to connect to it. This is a untested lot being sold as parts or repair and you will still need the proprietary cable that connects them together. (Not included) Either of these cards should theoretically be compatible from what I've read as they have the required AUD_EXT.. but do your own research on it because I have not been able to test it.
eBay