Tacoma Bed Items

I'm missing one of those box things in my 2005 Toyota tacoma bed.
Does anyone know where I can find one to buy?
It's not the lower boxes that you can close its the one higher up on the drivers side that is just like a little hole.
Also 2 of my metal rings on the bed came off. How can I put those back on?
Thanks guys

 

Ebay has all you need. Other than that, the dealer has them as well. Its a bit hard trying to figure out what the catalog calls them, but they're available at collision and parts sites as well.

 

I tried looking on ebay but couldn't find them because I don't know what they're called. Do you know any part/collision sites that are good?