I have obtained one of the ultra-rare genuine Subaru OEM roof racks specifically designed for the SVX. I believe it may be the only one in North America. As far as I know, this rack was only offered in Japan, and even there it seems like not too many people opted for it. One thing that is really nice about this rack compared to others, is that the feet are designed to fit the specific contours of the svx's roof. That way the rack remains completely straight and level.
Also, since I have this, I'll be offering my Unisport SVX rack for sale. Please PM me if you're interested.