Front spoiler bumper/valence, rear bumper/valence and side skirts all available from moulds held by my fibreglass manufacturers. On the car in the photo, the front bumper has had a custom bit grafted on to the lower edge from another unidentified source. Rear spoiler is also from another manufacturer's range, but the F40 spoiler is similar. Phone for prices....
The rear arches are modified general purpose flares, various types available from my guys.