You could do it yourself quite easily. 6 nuts on the catback (spray some WD40 on them for about a week before you plan to do this) then a couple hangers.
Replace the hangers and put the new system back up with the hangers.
Only problem you could run into is if the new exaust doesn't have good hangers, or any for that matter.
Kevin (President TBEA)
"WAAAAAAARRRRRIORS, come out to plaaaaay."