Fuel hose

Hello, everybody.

I have a little problem again:
When starting in cold condition, the lady started immediately. With a warm motor, she has a lot of strarten every time. One minute swallowed.
When the pressure in the line was rebuilt, the engine ran round again.
Now yesterday the petrol pump was replaced. A petrol hose is mounted on the pump, which is open on one side and on the other side. Without screwing. This tube now has some porous spots and I would like to exchange this.
Unfortunately I have no part number and no access to a part catalog.
Any of you got the part number at hand?

Greetings

Manfred