Allan, howzit? I should have said WeetBix! I know the Nebes etc, come from Hout Bay. Best thing you can do is ask the other owners how they solved
that problem. For my money
, go with fibreglass, make a solid Polystyrene mould, cover with plastic bag, glass it. Then pour petrol in at the pipe holes, it will dissolve the mould. Then pull the bag out. Now make a Glass Fibre tube that goes to the bottom and cut off at 30 degrees, then glass that in, finally glass in the inlet tube that only penetrates an inch or two.
Alles van die beste.