Always make my own. An essential piece of kit is a mini hand bender which gives superb sharp bends without kinking...looks the dogs bollix !!
When once you have replaced them with copper or cupro nickel, you can forget all about brake pipe corrosion problems. As already posted, it's the ones under the car that tend to suffer most-very rare to see corrosion under the bonnet.
***Remember to put the nut on the tube before you flare it !!!!!