Are you familiar with the M5 CSL that was built by Mats Kinnby some years ago? viewtopic.php?f=7&t=67418 Unfortunately most of the picture links in that discussion are broken but there are a couple video links that still work. He sold the car some years ago but I think it was still in Sweden somewhere.
There are various pictures of it floating around online, if you do a search on 'e28 m5 csl' you should be able to find some. They may be useful for inspiration. There were body molds that were sold with the car, if you can track down the current owner they may still be available.
Are you going to make molds afterwards for fiberglass?
God forbid something happens to the car (other drivers on cellphones?), you would want to be able to recreate the shape without all that hard work again.
