Can't find a sketch I'm afraid. All the measurements are in the back of my 90 that's still at the garage awaiting a replacement gearbox after it failed catastrophically on the M1 last month.
At the bottom of the side panel is a convenient lip that I used to rest the panel on. Measuring from the lip to the internal roof gutter that I screwed the panel to was about 520mm from what I remember. From the door frame pillar to the back was about 1400mm ish, but I added on a bit more (300mm or so) so I could make rear quarter light panels as well. At the back of the side panel were strengthening braces that needed notches cutting out to make them fit. After removing the seatbelt hanger, I used a set square to mark on the door pillar and roof vertical and horizontal lines to indicate where the hole should be cut in the side panel then I could mark on the ply panel where to cut with a hole saw. It's all a bit rough and slap dash, but seemed to work well.
The acoustic cloth I got from ebay came in 1400mm widths, so both panels could be covered from a couple of metre lengths. Hi temp spray adhesive to hold it on and a bit of trimming and you're done.
Can't seem to upload any photos, but I managed to cover both side panels, quarter lights, side and top of wheel arches and a double thickness on the loadbed floor with more to spare out of 2 2440x1440mm 6mm thick pieces all for half the price of the ready made ones.
