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The one installed on that particular Fit is from Webasto Hollandia. They also make a number of different types of sunroof, including twin vent single sunroof, and a large panoramic moonroof that expands almost the entire length of the Fit's roof. Now that I think would be pretty cool to have.
I remember back in my Audi days when I had my entire interior reupholstered, the shop I went to also did sunroof installations. It might be worth looking into for some people.