Order new outer rubber scraper/seals too. Your's will prob be too short and the end caps would need to be removed to install them. As you're in the UK make a comprehensive list of seals and order them all at the same time. Buying and shipping items individually will blow up your budget. There's going to be a lot of little items as well as the big ones. WOW! 45 eu is quite dear for a single end cap.
Other items? The 2 seals for each door/inner fuzzy strips/ triangle Windows, the 2 round pieces for the holes in the door jams, vert and horizontal window seals, side mirror base seals, the ones for the door handles, boot and bonnet seals, various seals for lights and lenses, fender to cowl....the list grows quickly. What kind of condition is your carpet set in? I'm here to help you spend your money.