I was in the same boat about not wanting to buy custom pre-bent brake lines, so I did them all myself on the whole truck. Bought a cheap but adequate double flare tool from NAPA for about $30 similar to this one:
http://www.napaonline.com/NOLViewer/...354&ShowPics=1
and just used the 1/2" tubing cutter from my plumbing repair box. It seems that the double flare came out much neater with the slight crimp in the end of the tube from the cutter wheel. I also used the $10 cheap-o round bending tool.
Bob
p.s. Dont be a ditz like me and forget to put the flare nut on the tube before flaring