i have a set of seats for sale if your interested or local enough to collect
viewtopic.php?f=9&t=71433i to have kids so wanted them to be safe in an accident.
i fitted the other set from a pair in my van, i had a set of 4 brackets fabricated and folded to the shape of the chassis legs and then along the floor sort of shaped like a top hat.
i found the place to fit the seats, measured all my sizes to get brackets made, then when i had the brackets positioned seat and brackets made sure they all lined up and drilled my holes,
bolted with hi tensile bolts and lock nuts also used plate washers