just cut off the end piece from a factory fuel line, that's what I did. Or you can get a 12" or 16" piece that has 2 ends quick connect from the auto parts store, look in the help section. I have seen the dorman parts at every local auto parts place.
The quick connect end goes into regulator, the other end is cut off with tube cutter and I used a 3/8 compression to AN fitting.