Don't shoot me for sullying this forum with non VW vans but it's sort of related. I am about to restore/renovate/modernise an 80s Hymer motorhome and I would like to get a front passenger seat with isofix mounts and it struck me that a rear Caravelle type swivel seat with armrests and self contained seatbelts may be just the ticket. Do you think it's feasible to have the floor mounts fixed to any chassis (it's Merc 410d based for the record) or is it something that has to be designed into it and therefore unique to VW?