Those shiney bits
I made my door in two halves. Top half is bi-fold, and stows away under the freezer. Bottom half can either be closed for weather, or fully opened against the bulkhead, where it is the same height as the window cut-out, or it can be lifted off its hinges, and fitted to the bulkhead to be used as a cockpit table.
Went to Docklands Boat and Lifestyle show today and had a bit of a look at the Seawind door. They didn't close it though, but could mostly see how it worked. 3 panels on piano hinges, so they fold to the middle and then the middle one is hinged at the top so that it folds up to the roof. Next time I will have to get some photos of the details to see how hard it would be to make something similar as it is very nice. As I doubt they would sell you a door only ??