And we found ours, a 91 steel Burley Duet, at Recycled Cycles in Seattle for $350. Considered the S&S coupler thing and decided against it for now. We love ours, have done about 5,000 miles on it in the last couple of years.

Here's a link with a bundle of different tandem articles, links, etc.--

http://www.thetandemlink.com/Learnin...anchor10417632