Why does the left rear hang low ???

Just wanted to thank you guys !! My Duster is sitting nicely for the first time that I can remember .. I got those bolts freed up and the adjustment was a breeze.. It was so far off I had to back off the right front 12 full turns to get the rear end level, and then tweaked it from there...

I noticed a couple rubber bushings about the size of a golf ball on the upper control arms that look like there's just a bolt holding it on to keep metal from touching metal.. One is shot .. Anyone have a source to get new ones? I know the upper and lower control arm bushings were changed..

Thanks,

Kenny
oh, and no ss springs.. same amount of leafs both sides