I have been looking for a new rear panel for my blue 360 for a while and occasionally I just chuck the part number into google and see what shows up.
Something interesting has shown up on this weird Russian website.
http://vegaauto.com.ua/
I've tried messing about using Google translate, and it looks as though they can come up with the part 3287449. which is the rear section for a 4 door saloon.
Can anybody who can understand Russian take a look and see whether this is worth looking into further? The price is rather steep, but then so is getting someone to try and hammer straight the existing panel and won't look nearly as good as a new one.