Plastic trim around windows

[LUX406]

I'm looking at sorting out all the little niggles on my recently purchased 406.

The one that makes me most is the strip of trim that runs along the bottom of the large window on my nearside rear door.

Its raised about 10mm from where it should be at the front edge and won't sit back into its original position as it looks to me like the strip is damaged.

Are these pieces of trim still available from the main dealers and are they easy to replace?

Any help will be great peeps, thanks!!