Injection Pump part number info please?

[axxeman]

My fuel line into the injection pump, from the filter outlet, is weeping at the banjo bolt connection and so a couple of new copper washers are required. However, my online parts catalogue does not show them anywhere and so I have not been able to trace the part numbers in order to get replacements. Does any kind soul have the answer?

And yes, I did try to tighten it - no good.