I know of nowhere, but would try calling a Ford Dealership parts department. However it might be hard if not impossible to get a pre-bent line into an assembled vehicle, unless you un-bend it quite a bit to fish it through.
What I would do is buy a quantity of bulk brake line, copper-nickel "cunifer" line is easier to bend than all steel, can be bent by hand without much effort, then of course you'll need the tube nuts and a flaring tool and tube cutter, file/sandpaper/etc to finish the cut ends good before flaring.
If you can determine the length it needs to be, maybe fish a piece of string along its route, then measure the length of string allowing a few extra inches for bends, auto parts stores sell lengths of line pre-flared and with the nuts already on it, but the longest length I recall at (autozone?) was something like 60", and it is steel not cunifer so a little harder to bend by hand in tight areas, but (autozone, or elsewhere) might have a bender, loaner tool for that. However, you will still need to cut off one end, reuse the old line nut on the ABS module end, and flare that end.