The front plate on the 4runner must have been sticking out a little on the bottom. The garage door caught it, and ripped it off the truck, along with the molded-in spots for the self-tapping screws that mount the plate.
I could bodge it - it's perfectly friendly to me making up a solution, but I'd rather just buy the right part and fix it. That part is the lower grille:
So, I take my VIN to Toyota and after some false starts, it brings me to this diagram here:
https://parts.toyota.com/showAssembly.aspx?ukey_product=63107792&ukey_assembly=6720941&ukey_make=5775&ukey_model=89443&ukey_driveline=70247&ukey_trimlevel=144460&modelYear=2007
Specifically, the 0007 diagram (see the View More Images link) on that page seems to show my front bumper.
So, 53112E looks like the part!
Oh oh, clicking on it brings me to two identical looking parts:
I can't find anything between the two parts to tell what the difference is. The only differentiating factor seems to be the part numbers and the price.
I don't have much experience digging through these diagrams by myself - I'm usually standing in a dealer parts department. Any advice?