That part number came from an Alfa Romeo microfische that came from a dealer here in the USA. I do not believe it was correct outside of the USA.
Most cars in Europe first did not have the Spica pump and later id not have the air conditioner compressor where the Spica pump used to be.
US spec cars used a water pump that had the connector coming straight out to the right side of the car at the 9 o'clock position if you were facing it.
ROW cars had a pump that had the connector coming out at the 8 o'clock position which interferes with the earlier Spica pump and the later A/C compressor.
See attached photo.
I got a reply from DiFatta today saying that the hose as not been available for 13 years.