I bent all my lines myself with an inexpensive bending tool. Now as far as flaring goes, there are many flaring kits around that are pure junk. I would think that you would have to spend well over $100 to get a kit that works. That is why I gave up on the flaring and bought the pre-flared tubes.
I assume that the line that is broken goes from a block on the right side, across the front cross member and along the frame to terminate on the left hose. That may be quite a challenge to fit in but i know that you can do it!