It would be an interesting challenge to make that panel from aluminium, with a slightly curved profile along the sides and rear. It could be made to fit brackets along the rear and use the hood pivot points at the front to hold it down, but with a quick release. Covered with 4mm neoprene sheet, then mohair, and lined with neoprene inside.
I'm thinking something a bit like the old 911 Speedster rear deck but not as curved......................
Oh I'm not offering by the way!
VSM could probably knock something out quite reasonably for a DIY finish.
