Hi Ian, I've been contemplating this today whilst stripping, cleaning, rust treating and painting the second driveshaft and outer CV joint ready for reassembly on Friday....
I'll contact the makers and see if they have a distributor who can cut a couple of sheets into 48cm panels and post them to me as its a 5 hour round trip to the nearest stockist!
Once that's done I think it'll be fairly easy to cut two thicker pieces of plywood to pattern to make a sandwich type jig that, once set up, will take minutes to rout out a plastic panel. I may need to think about the fixing pins for the vertical sides to use a more easily available clip though? Plus there are a lot of holes in the panel that don't appear to be applicable to my car. I'm not sure all would need cutting? Just the alternative one for manual winders? If I do proceed with the project I may need to canvas opinion as to which holes are actually needed!
Watch this space as they say....
Guy