I wouldn't start shot gunning it with parts and hope it works. Measure the distances of the suspension travel, length of the arms and look at the condition of the rubber bushings etc. With the car raised try wiggling the wheel from side to side to check for bearing play, look at the condition of the cv boots and compare everything side to side as little as 1/8 of an inch can make a difference. When it makes the noise/vibration it's most definitely coming from the rear and not right about where your butt is in the center of the car right? Try switching seats have someone else drive and see if the sounds shifts position, its common for the tranny mounts to collapse and the center support bearing rubber to fail and you get a drive shaft knock at low rpm when starting out but then it goes away. It sounds like the rear end from the drivers seat but moves when you're in the passenger seat.