Old thread here, but I thought I would comment for the good of the moparts community.
I ran into the same issue with the bushing in my parking brake release mechanism. Just wanted to say that the exact bushing is readily available under the description "nylon shoulder washer". I bought 40 pcs from Granger for $5.77. It can be had here:
4DCJ9 Shoulder WasherIt does require the release pull linkage to be removed at the rivet. The shoulder washer does have enough clearance to slide over the release linkage bends. See photo for new shoulder washer niext to the original and the release linkage in the background.
Cheers.