rear passenger window seal replacement

Hi all,

Had my A4 broken into yesterday . They smashed the rear passenger window.I've had the glass replaced by Autoglass but unfortunately the thieves tried to lever off the black seal that goes around the window. There is a metal strip within the rubber and despite best efforts the seal remains unsightly. Does anyone know if this is fairly straight forward to replace? does it just clip on? I notice it goes down into the door itself but not sure how far down.

Thanks for your help.