What is this part?

I've attached an image of the front bumper on the driver's side of my 2010 Prius . Can you tell me what the plastic panel in the red box is called? It was scraping against the floor, so I can only see part of the part number: ?3074-67835. The similar panel on the passenger side has the number: 06074-57832, although some of the numbers are hard to read. It seems to go over the flap near the fender on the inner fender well. Thanks.

 

Thanks for your reply, Navy. I don't think that's the part. The shape and holes are different and the panel is just behind the front bumper. When I google "front bumper spoiler", I get a long and thin plastic piece that looks very different.

 

The diagram was helpful, Buzzhead. The only piece that seems to match is the liner, front fender, left. The dealer Navy mentioned said the same thing and some detailed pictures on a used original product from multiple angles on ebay look exactly like my panel. I'll post a message in a few weeks when I get the part if I'm wrong.