View attachment 6284.get a sheet cut to the biggest width and the height of door,clamp or screw with self drilling screws so its forced into the curve and draw round it,cut it out and screw it on again then close the door and do it again only this time drawing round the inside of the rubber,cut again and screw it back making sure no screw interferes with the locking gearwhen you've done them both ,close them and cut a strip of ply to cover the join and fix to the passenger side door.not a bad idea to run a bead of decorators caulk round the panels when fixed to stop wet when doors are opened inthe rain ,sorry only pic i took
when cutting plywhere the edges will be exposed its better to use a jigsaw blade with downward pointing teeth,once you get the hang of them,the line is easier to follow and any splintering is on the back