Mine have cracked into layers, and then chunks.
Some chucks were where the bumper itself mounts into tab/bolt-on bracket - so no more stays in place.
Anyone found a source or updated part that works?

 

I've been wondering about those too. Mine are shot and crumbling. Mopar ones are $60 each. Maybe something like this could work?

 

D'ja find a good number for Mopar?

 

52106494AA is the number for 4wd, 52106514AA is for 2wd. Looks like the rubber part is the same, but mounting different 2wd to 4wd.

 

Good work, looks right to me (single dent per side to mount rubber to metal bucket). Mine just read ....6286AA
I looked for hours, decided to construction adhesive mine back in, screwdriver to reopen chalking gun spout went into hand, lost 4 hours hospital and still not done.

 

I don't have a great picture of mine, but you can see how roached it is in this picture from me swapping to a disc rear axle this past weekend. A bit beyond gluing back in, so needless to say I need some replacements. I was kind of astonished that the rears are so hard to find given the fronts are available and cheap.