Those are not very difficult to install. I believe it takes about 2-4 hours labor. I had to put one on one of my trucks a couple of years ago and I believe that is what they called for when they quoted me a rate at the dealer. It wasn't a Freightliner, but I would not think that it would be much different in the time. You could call the service department at a dealer and they could give you the book rate. Then find a mechanic who will do it for less.
