With great difficulty I got the replacement trunk piece to fit, or so I thought. Could somebody do me a big favour and measure the right pan width at the back and the front of it (right in front of the wheel housing). The back on mine is off by a good inch so that's not going to work. If I know the dimensions I can figure something out. Never occured to me to take these measurements before I slaughtered the old piece. 
The way it sits in the picture, the gas tank will be way out when I drop it in

The way it sits in the picture, the gas tank will be way out when I drop it in