I'm in the process of making a gable hood for a Tudor guide at Speke Hall. It's a very interesting structure, but I have difficulty with finding any period-looking fabrics, so I'm doing a bit of DIY: the lappets are a piece of cream coloured dupion silk with a wide gold trellis ribbon stitched on. This is the back as seen in Holbein's drawing. This is an excellent website for research and construction: http://www.elizabethancostume.net/
The back of the base. I used plastic canvas to make the box as buckram is hard to get.