Have you tried Maranello BMW? They would obviously have them and they give a discount to maX members (www.maxbimmer.com/forums/showthread.php?t=133817
I checked www.autopartsway.com
but I don't think they have them. You could try www.getBMWparts.com
but I have never ordered from there before. They do have those parts though.
I'll be watching this thread because my car has spring a fuel leak so I may need to replace a few lines myself.