I ran across this on Craigslist (SF Bay):
1973 42' Jim Brown Manta Trimaran 15900 OBO
The guy (Chris) sent me pictures of the inside and after looking at them I was reminded why I don't like Searunners all that much. There isn't much wrong with the boat as far as I can see in the pics and by listening to him but it just isn't what I am looking for, even at $15k or so. It might be perfect for someone else.