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If you are lucky [which you apparently are not], you might just have some dirt in one of the valves in your fuel pump which you might be able to clean out.
It is similar, if not identical to a Carter design with the exception of the additional valves and a Carter rebuild kit may in fact work and be cheaper, but I don't know where you would get one in OZ.
The place that makes the pump could Fedex the parts to you and you could use my Fedex account to save on shipping.