Hey Harvey!
I went and looked at the backs of the headlights again. They don't look like they're aftermarket. The back caps that house the bulbs have two wires coming from the bottom edge that go to the main connector, same as the regular JDM, UK (which I also have), etc.. But then there's three rubber boots in the flat, rear part of the cap. Two small ones with one wire coming out of them and one larger one in the middle with two wires coming out of it. These wires, outside of the cap, all have separate connectors that connect to the wiring for the ballasts. Also, Sun Powerview is approved as OEM equipment in Japan. Could it be that Subaru used these HIDs in the SVX towards the end of it's production?
The photos I posted were from the advert. I'll take some other photos myself and perhaps get a better view.