Suspension part? Options

[Starcraftjunkie]

My car recently started to have a noticable wobble or shaking and I've sort of narrowed it down to the rear suspension area... I talked it over with my mechanic and he thinks it's the bushings around the arms.

I've tried looking at 1sttoyotaparts.com but their diagrams don't really show the part.
I'm curious to if anyone can lookup the part # or point me in the right direction.

I'ved uploaded the image into my profile since I can't currently ftp to my host server.

We've managed to order #2, but it has be to shipped from Japan... .. but is there a toyota part #1 so I can try a search it? Same goes with #3; can't find it local and can't even order it. Can anyone help with a part #?

When I kick the front side of the rear tire, there is a clunking sound. Kicking the rear side is pretty solid tho.
I read a thread about replacing the arms.. which arm is the culprit? (Front/rear/trailing?) And would this cause the rear of the car to wobble/shake at random times when driving?

Thanks for any insight.