You are going to have to make your own lines, or pay someone to make them for. I do not know of a vendor that is offering them as of now. Check this thread out to see what you need to do. He may still have a set as well. I know he was selling some extra tube and his bender a while back though,
'75-'79 2f Hard Fuel and Return Lines
As far as the radiator goes, I bought the 4 core from radiator barn and it was cheaper and way better than the Autozone or napa one. Plus they have great customer service. Just save your radiator cap, as the new one does not come with one. Might want to change some hoses while you have it out. All are available at your dealership or from Cruiserdan on this board.
Jeremy