3rd generation under rear bumper plastics probably missing?

You're missing the rear part of #11 in this illustration and #18 (both sides) and #16 in this illustration.

 

History of car? Has it been in the body shop after rear end damage? This is typical of shoddy body shop work.

 

Thanks for coming back.
All those plastic pieces on the underside are expensive, same goes for their fasteners, and it's very likely the bodyshop, trying to cut their costs. If you find out the place, and especially if it was an insurance repair, you might be able to chase them for it? On second thought, they deny it, and then what. Ah well.

With your location, maybe look up those part no's kindly listed by @Vman455 , on Amayama; they "may" be a better deal, and more easily purchased/shipped. In my experience all they charge is the part price plus shipping, no taxes or duties are levied. It's likely best to get all components from one country or another (UAE or Japan), to avoid two shipping charges.