...then laid up the mould to get a copy of the original minus the access hole:
After some fettling I got it to fit:
The next hurdle is to work out how the duct will weave it's way through the suspension components as it is all very cramped around there. It looks like there will be just enough room to clamp the exit duct to the suspension upright and run the flexi pipe upwards and back to the chassis leg, entering the arch liner somewhere here:
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