Both of those will work, and obviously the newer the better. Just make sure you have everything and you should be OK. I was quoted 300 dollars for rear trailing arms, discs, rotors, lines, ebrake cable, everything from an online junkyard.
ya, i used the rear trailing arms from an eg. paid $170(i think) for the whole swap. check http://www.rcrewracing.com they should be able to get them for you. i got the rear trailing arm, calipers, semi-used pads, rotors, and ebrake cables, it all comes as one peice, very easy to do.