Anybody know the name?!

can someone help with a link or a name to search for this? I'm missing the right side cover below the tail light. Thanks

 

The black plastic piece that was under the tail light?

That may be called the rear pillar garnish. If I read the diagram correctly, at least.

Is so then it's 62571-04010 RH (passenger's, the one you show) and 62572-04010 for LH (driver's).

ETA: I should be clear that I'm not 100% sure of this and it's about a $25ish part, so hopefully someone can verify if you're not willing to be a guinea pig.

 

Looking closer, the diagram shows 90467-10107, which are the plastic snaps that hold it in place so I'm fairly confident.

The actual trim parts are indicated as 62571G and 62572F.