I'm an idiot. There are 2 banjo bolts. One connects directly into the pump (very large banjo bolt. Needs a 1 1/16 wrench to loosen IIRC), it connects the solid neck to the high pressure line which uses a second, smaller banjo bolt. You need this guy to connect the neck:
Banjo Bolt
He holds in a valve though, so I hope you haven't lost the valve and spring as well.
Valve
Those are the KA versions. The banjo should be the same I believe, but I don't know about the valves. A lot of the pumps' internals are similar enough, but I've never been had a KA and SR apart to do a side by side.