Approved Used With Missing Cover?

I recently bought an "Approved Used" 2006 Prius Tspirit from a UK Toyota dealership. It comes with a one year warranty.

I've noticed that the plastic cover for access to the right tail light is missing. Should the dealership supply one as part of the used car reconditioning or under the warranty?

I don't have any information about the warranty yet - might take up to four weeks to arrive with the Club Toyota paperwork.

Alternatively if I wanted to buy one is there a way of finding the part number so I can shop around?

There are a couple of minor plastic parts that need replacing as well, like the plastic latch cover behind the rear seats for child seat anchoring.

Any advice is appreciated. The dealership were a bit, umm, errrr, awkward to deal with. But maybe I just don't like dealerships...

Thanks, Andy