You do realise that VR's come stock with bucket seats, unless you get one of those 6 seat column auto ones with a front bench, which are kinda rare, i only ever seen 2 of them
Ask whether they have Australian compliance - if not then your insurance will be null and void plus your car will be unroadworthy unless you get an engineers modification plate. They sure look good but you take a risk...............
i realise this isnt helping with the original question...but make sure you try out any seats like that before you buy them.
some can be terribly uncomfortable for daily driving as they are primarily designed for use in a track car with a four point harness. some are ok, but most will be quite hard and contrictive...which is hell on a long drive.
I have a spare set of belts that are in pretty good condition... I got them when I bought the calais interior. It is off a vn, so the only difference is the back seat in the middle... I think ...