I also prefer bench seats... actually split bench with an armrest to be specific. One way is to choose something from another vehicle.
I would measure the width and look for anything from anything. You'll likely have to drill new holes, cut off legs and re-weld and use spacers to make it fit, but I've done it and usually there's only a few legs that need modifying.
GM made a lot of power seats with the controls on the side of the seat and those are pretty easy to wire in. Upscale models like LeSabres, Bonneville's, Caddy's and Town Cars have nice seats.