like i said...
i actually cut out the entire rear section, only leaving that vertical wall where the carbon fiber sticker goes....
then i used some washers and pop rivets to fasten a piece of bent roofing iorn to it. the washers spread out the force a bit.
overkill i know but i broke my first one where i did the same thing but with lexan.
hope you can re-enforce it somehow ;)
maby my method but do it on the inside of the body so you cant see it and leave the existing plastic there...just double it up, pop rivets look nice with washers too