1.9TDI AFN Split hose in PCV system - can't identify it

Hi

I have a split hose in the PCV system which is blowing and spraying some oil around; it's blown the foam from under the engine cover to bits and made a nice oily clumpy mess everywhere - as you can see.

I've done a lot of googling and searching around PassatWorld - but I can't identify the hose; VW said there should be a part number on it to allow them to order one - but I can't find one on it leading me to wonder if I have to buy it as part of a (presumably expensive) kit / assembly :-(

It's circled in this image; can anyone help me with a part number and/or name of the hose?



Also - when I am replacing that hose, is there anything else I should be checking out (i.e. could the split be a symptom rather than a fault in its own right)?

Thanks

Doug