My dealership is, I think, one of the best for parts. They were a Jeep dealer before Chrysler bought Jeep, so it's not a Chrysler/Plymouth dealer who now also sells a couple of Jeeps. They do NOT stock factory hard brake lines. The parts department stocks standard lengths, and they make 'em up to fit what's needed. I don't think you can even order factory hard lines.
There are two companies who advertise these in the 4x4 magazines. One is Classic Tubing, I can't recall the name of the other. I ordered a set of rear lines for a D44 axle. They told me they had a template. Tubes came, and weren't even close to being a match. I think they must have been for an older full-size Cherokee with the wide wheel option. Sent them back, with my originals, and they remade them. They did NOT return my originals, so I now have no template, even though I specifically asked them to return the old ones and they said they would. And I ate the cost of shipping the bad ones (with my old lines) back to them.
I don't recall which company I used, but someone else on here had the exact same experience with the other company, so the one is as good/bad as the other. The only advantage to having them make them is the spring wrap gravel guard. For the cost, I would not do it again. Just go to AutoZone, buy standard lengths a bit longer than what you need, and invest the money you saved in a good double flaring tool so you can cut the new tubes down to the length you need and reflare the cut end.