[Vwdiesel] Fuel return line

[Scott Kair]

    While I was changing injectors and their return lines, I noticed
dampness around the return hose that goes from a barbed connection at the
pump back towards the tank.  It seems to be of a slightly larger diameter
than the short return hoses that run from injector to injector and back to
the pump.
    I snipped a bit of the apparently larger hose and plugged it back in,
but noticed that the cloth covering was a bit brittle.  Apparently this
isn't the first snip job; rather than making a gentle bend from the timing
belt cover to the fitting on the pump, the shortened hose must make a rather
severe bend.  I suspect that it won't be long until the barb wears through
and I have another leak.
    Does anyone know what size this hose is, how long it is, and where I
might find a suitable replacement?
    TIA,
    Scott Kair