You'll have the best luck with domestics, as a front bench seat is an American thing.
Quick search after eliminating trucks, SUVs, and the larger cars like the Towncars from the copy and paste list, leave:
Chevy Impala & Buick Lucerne
The Impala and Lucerne seem to be the only "smaller" cars that retain that retain the option of bench seats even for the 2008 models.
Older Toyota Avalon also had a front bench seat option but only like 8% of buyers requested that option, so it was dropped in the redesign, and it might be hard to get a used one with the option.
But even these choices are still split buckets with the center seat (it is an actual seat with it's own seat belt) being a third piece that is also a fold down arm rest.