Apologies guys. I have tried to search and Googled for these part and I don't know what they are called. I replaced my rear bumper with a SmittyBuilt XRC bumper that holds my spare tire.
There are two rubber "bumpers" that held the tire a certain distance from the tailgate when it was mounted to the tailgate.
Do they make a flat piece, or something that can replace these no longer needed rubber parts? In fact, the place that installed the bumper shaved a bit off the left one to allow the tire carrier bar to close.