I agree with Odyknuck, I would rather use steel brake lines too, that what I am running, and uses stainless flex from the rail to the calipers.
Here's what I used on mine.
http://www.jegs.com/i/JEGS/555/63030/10002/-1You can also get them in powercoat silver or black.
And these is what I used on the lines from the rail to the calipers, I did not get them from Jegs but something very similar to it. I got them from the local race car shop and the brand name is Fragola and they are the best, that is what they run on their late-model cars for their clutch and braking systems at the wheels.
http://www.jegs.com/i/JEGS/555/635000/10002/-1