You were doing it right. The layout of that website is a little wonky. The £12 listed is only for the first item in the drop down menu. It would have been less confusing if no price was listed until you selected an item.

They aren’t giving them away, but that’s just how crash parts are. Exterior light lenses, bumper covers, trim, and so on will always go for top price due to supply and demand. Get in a fender bender and those are the pieces you need.

While not cheap, £50 isn’t outrageous. I was once in a similar situation, needing the Y (in Mercury) for the rear hatch on my wife’s car. I stopped at the dealer, figuring they could order one. The poor guy at the parts counter was getting frustrated because he couldn’t find it in his parts books. He said he’d have to make some calls and get back to me. The next day he apologetically called. The letters were not available individually and only came with the entire liftgate assembly, for several thousand dollars. I politely declined and we kept driving our Mercur as is.