I think a toyota P/u front brake line will work at 18 inches. I don't have a part number though. I had mine made, my front axle is a 77 and my FJ is a 70, so the brake ends are different sizes. The company that built them for me took the ends off the lines that I had and recrimped them on DMV lines. Spendy but the only way I could do it.
The tech page is a big help, but my local NAPA doesn't always show the same part I'm hoping for when I give them a reference of the tech page...maybe that's cause I'm down in the boonies of southern Colorado I found the reciept for the rear lines I used when SOA ing it, and will probably just order the same stuff for the front. Appreciate the help