they were not meant to be replaced I cut out the spot welds with a spot weld cutter to remove the bushing then welded the holes up ground them clean then spot welded new prothane bushings in 2 spot welds on each end can;t remember what bushings i matched them up to
Yes to save some cash I did the same as cuda joe years before Firm Feel E-body rear bars were available. My sway bar itself was in ok condition. Back then I was able to reuse frame brackets, after disassembly wire wheeling and blasted at work, adding new bushings. Also I needed to clean up/ remove rust from my rear sway bar end link lower leaf spring mount brackets. As for parts, they were inexpensive, as I was able to match up /purchased new end links & bushings etc, from local Auto Zone parts store, very low cost. Years later when they became available, I purchased Firm Feel, only because mine were pitted.
If you are able to clean up/ reuse your upper frame and lower mounting brackets and you only need the bar itself, I have the rear sway bar hanging in my garage you can have for cheep, typical pitting but serviceable,( just the bar, don't have frame brackets ) . good luck SCHU.