Selespeed Box Issues

[Devious]

Hi guys.
Im about to become an owner of an Alfa 147 2.0 Twinspark.
The thing is, its got the selespeed flappy paddle box.... (I know, I know run away) but ive got the car for such a good price that selling the wheels alone would make me a profit on the car.
According to the guy who owns it, there is a pipe that runs from the reservoir to the box. This pipe is perished and thus causing the gears to go a little crazy ie selecting up and down all the time whilst slow/town driving but ok on motorways.
Does anyone happen to know what this pipe is/how much it costs?
Im pretty sure the box was fitted to Fiats so it aint gonna be too different.
Ta

 

[s130]

Looking at ePER on for a 147 Selespeed (type no.190.855.0.0 ) there are two hoses that go from the header tank to the box. One costs approx. £56 and the other approx. £50.

Without your vehicle model/type and possibly chassis number it is not possible to be more specific.