Seal for red turbo pipe, 2 required - 3C0145117 - £3.67 + VAT
Clips for red turbo boost pipe, 2 required - 1J0145769 - £1.11 + VAT
*These apply to PD130/150, reply with engine code if you'd like confirmation.
I would recommend inspecting the lugs on the pipe and pref replace the clip as well as the seal. VW revised the seals and the new type are green over the original black ones, the clips also changed they had a more rounded profile to the edges, those are now squared so pipe is less likely to pop off as before.
Hope that helps.