Have you tried asking DNA? If no luck maybe someone could lend you a pair so you can get them scanned and printed, you may only need one and if you get it scanned they can flip it to make a right and left. They scan the item print it and then vacuum form the perspex sheet. I remember seeing this done on Car SOS and wheeler dealers , both needed a perspex cover for a Messerschmitt 3 wheeler so there are companies that can do what you need.
Don't know if that helps?