I have found a feed pipe which I picked up a while back in a scrap yard. This pipe goes all the way to the tank, and fits better. The pipe is marked SAIG Lancia/Fiat A 8-249 9F possibly off a Punto Diesel Turbo.
Lancia/Fiat Diesel Turbo feed pipe
Fuel tank filler had to be cut and welded about 45 degrees to mate with the pipe
This is best done with a new tank as its difficult to fully flush a tank for welding
pipe is a 2. 1/4 inch high pressure
fuel resistant hose and should be well up to the job.