Not sure what you are refering to as far as the "idle"?
As far as the control arms you have an upper and lower on each side. Each have 2 bushings. I just replaced my upper control arm bushings. They are about $22 each from Merlin at St. Charles Isuzu. I believe the lower bushings are cheaper. The upper bushings are the same part number as 95+ Troopers.
Hope this helps.