I replaced my top on my '01 about 3 years ago. Check out
Robbins Auto Top Company convertible tops. The pics of the spa yellow is me. They did it for free since I was the first S they ever worked on. I am very happy with the glass window they gave me. I think you can get one with a defroster now too. I don't think they are too expensive. They donated one as the top raffle prize to the S2000 Club of America back in '05 and I believe that person sold it somewhere around $600. Robbins can ship it to a 3rd party installer near you with the directions.