The pitman arm is usually not a wear part. It connects solidly to the steering gearbox on one end and solidly to the steering linkage at the other. About all that can happen to it is that it breaks, unless the joints at the ends were loose on the holes. They might be thinking of the idler arm, or rather the idler arm pivot shaft bushing. That has been the single biggest problem area on all my LUVs for loose/sloppy steering. The idler arm is basically in the same position as the pitman arm, but on the opposite frame rail. At one point I was able to get the bushing at NAPA, but I recall going through a lot of trouble to get it. You might look into pulling the whole idler arm bracket, shaft, and even the arm off of a junk yard truck and then getting the bushing replaced in the spare bracket. If they are really bad, the shaft will be worn out too, so an extra shaft helps too.
The strut rod bushing is a tough one, I can't remember ever seeing them available. I was always wanting to find a poly replacement for them, or get some poly stock of the right diameter and make some. They generally don't get too trashed, so you might be able to get one at a u-pull-it junkyard that would be good enough.
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95 Isuzu Trooper Daily Driver
86 Isuzu Trooper reliable backup
77 LUV 2wd stock beltway blaster (resting)
79 4x4 LUV project: 2.6L, 5spd, 31s (eventually)
MEPR: Man, my 4x4 makes all other LUVs look good
