I replied to your youtube comments, but I think I understand a bit differently here. I think you have the rear arm mixed up with the front bushing.
The common failed bushings are the front lower and the side arm. The side arm is only available from Toyota as a preloaded assy with the arm/bushing ( 52380-60040 ). The front lower is available as the individual bushing ( 41651-60010 ) or the full assembly with the diff cover (multiple part numbers). If you want to do the full assembly, you will be removing the diff cover. I would not do this. Just fight that lower bushing out on its own.
The 52380-60030 part number is for the rear arm. In my experience (a 99 with 280k miles and an 06 with 218k) the rear arm was fine both times. The other bushings were terrible. The little pucks (stoppers as Toyota calls them) never looked too bad, but they're cheap enough that I think it's silly not to replace them while you're in there.
Does that help?