When I had to replace some of my lines, I just went to the local auto parts store and got some metal fuel lines of various lengths and sizes. You also have to get the fittings that attaches to the new lines that you purchased, e.g. you will most likely purchase fuel lines with male fitting at each end, then just purchase female fitting that will attach to your existing fuel lines. You will probably have to borrow a flaring tool for the end of the existing fuel line.
I've also know people to just use neoprene fuel lines depending on the length needed. Neoprene is a rubber line which has been known to be used as a substitute.
Long Live My Bonneville 97 SSEi Dark Cherry