Does anyone have experience replacing the rear wheel arch housing which sits behind, above and in front of the rear wheels? These parts come in two sizes 350 and 380mm which i presume are the widths and of course I want to order the correct size. I’ll take them out and measure them but it would be good to know. Reason to replace? Somewhere along the line, someone has badly cut out holes to get at the rear fender side fixings. I’ve owned the car from new and have no idea who!