Can you not use rubber automotive fuel line material with the same inner diameter available at auto stores and just cut it to length? I have replaced most of my fuel lines on many bikes that way. As long as there are no kinks in the line that interupt fuel flow it will be fine.
If its high pressure I would use the proper stuff. If its low pressure, I have some of the formed stuff from a 1st gen as well as couple feet of extra bulk type stuff in my parts box.