OK, exhaust fixed. Had been considering SS back box at least, but speed was of the essence here, and my local place got me fixed up very pronto with a good quality job for ?160, so mustn't grumble.
Main point of the post, however, got the stickers fixed, as shown here. I think its gone a bit bulky for the 5 door, but should be OK in the Coupe, with its bigger window. See what you think.