My kombi is down as a 6 seater on the log book, but has a captains passenger seat instead of a double bench. I sourced a single seat with seatbelt and 4 floor brackets from t4t5parts on ebay and set about fitting it. As much as I wanted to fit it over to one side, it was simply to easy to just fit it in the standard centre position in the third row. This utilises all the factory reinforcing points. First of, drill up from the underside through the reinforcing holes. Next was to open out the holes from the top to 10mm. Then, after treating the bare metal with hammerite, bolt the 4 floor brackets down and cut the holes in the floor mat following the marks on the underside of the mat. Just popped the plastic trims over the floor brackets and job done.