Hi mate, been lurking for a little while and interested in your Coupe, not too worried about the rear arch rust, do you have any pics of underneath the car / what is the condition like? Assuming rust is confined to the wings I don't really have any issues with that (don't mind a bit of work replacing them, as others have said there seem to be a few on Ebay (assuming price direct is fairy expensive)), also have a friend who owns a spray shop so would probably end up re-spraying the entire back end anyway (and possibly front bumper) to be honest.