G'day Kim,
Unfortunately if you cannot find an original replacement which has inverted flare ports, most aftermarket replacement ports are SAE/DIN bubble flare. This means you will have to replace the pipes or flare original pipes to match the ports in aftermarket replacement. (Had this problem with my S 2A rear 3 way junction.)
Also the input port thread on the aftermarket junction is not long enough to allow the hose connection shoulder to bottom out on the copper washer. This port has to be drilled and extra threads tapped to make it work. (A tricky machining job to setup.)
Good Luck
Chris
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