Bench seat

Do any car makers produce a sedan with front bench seat?

Ford Crown Vic?

IIRC, the Crown Vic is now only produced in a police version.
However, the OP might want to visit a Mercury showroom in order to look at a Grand Marquis, as it is essentially the same car with a bit more luxury thrown into the interior.

The Merc Grand Marquis is almost sure to have a bench seat, at least as an option.
After all, since most of the really old senior citizens drive this model, I think it is safe to assume that bench seats are available.

It’s still an option on the Buick sedans, too.

Yes…2009 LaCrosse and earlier Avalon models…may be able to find used.

Impalas might still have an option for a bench seat