question about front end body parts

So without actually running into anything (long story) I find myself in need of
locating a couple of front body parts but I'm not completely sure what their proper
names are. One is simply the black plastic 'grill' piece that extends horizontally for the majority
of the front of the car (under the hood latch).

I also just yesterday noticed that there are missing pieces which flank on either side where
the above described grill piece is located.

2 questions - where is the best source of a parts diagram that I can use to identify the names
of these missing pieces?
And what recommendations can be offered to source them beyond possibly local
used auto parts ie junk yards (once I know the names of the parts I need) ?
Amazon, eBay?

thanks in advance.
05 Prius (car in question)
17 Prime (love this car)

 

thank you.