His last recordings were the title music and cues for a cartoon series; he died 6 months after recording these. The opening and closing pieces are available to download from here. They're only a couple of minutes each but they're mighty fine! I have the opening track as my mobile ring tone - sounds great on when it rings on the train.
http://www.adultswim.com/downloads/index.html?CN_movieType=show&CN_show=Space%20Ghost