Looking for a part for Challenge DW-1800BH pressure washer from Argos.

The lance is leaking (still works but I'm getting soaked).

Inside the lance there is a plastic (stupid idea) part that the inlet hose feeds into, and it feeds out via the trigger.

The plastic part has a hairline crack along the "seam".

Looks a real easy fix but I cannot locate this part despite hours of trawling on tinterweb.

Anybody know where I can buy this part?

Thanks.

Deltech, April 2021

Warranty expired. Argos customer service as much use as a chocolate teapot (as usual).

Deltech, April 2021

What did Argos say when you contacted their customer service?
How old is the thing? Could it still be under warranty?

Fribbl, April 2021