Check out the full write-up that I did on the subject:
post6572392.html
The quick answer to your question:
1 x Dorman 905-803 Rear Driver Side Lower Trailing Arm
1 x Dorman 905-804 Rear Passenger Side Lower Trailing Arm
2 x Dorman 905-802 Rear Upper Control Arm
and get a set of replacement bolts. I don't have the part number for just those since they came packaged with the bushing set, but give 4x4parts.com a call and they'll find it for you.
And yes, control arms and trailing arms are the same thing.