Hi @LuRkIn yes you would need to buy the whole assembly. Patrolapart from what i seen was the cheapest.
Or... do what I did and hit up the local Enzed bloke. He charged me $150 to replace the flexible hose coming from the reservoir to the hard piping and and another piece of hose that needed doing too. You will find they use better crimp fittings and hose too than whats on there so you shouldnt have an issue again.
Its an easy enough job though just fiddly getting to the connections.

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