I am looking for info on what year bench seat would bolt into my '65 Elky. I have a bench seat from a sedan and the backs don't flip forward. I thought maybe an earlier or later year bench seat might fit the same track width, etc. Would be nice to have a center arm rest (and/or cup holders in the arm rests), but a nice plain bench would be fine as well. Did they have a power bench seat? Decent upholstery would be helpful so I don't have to buy seat covers yet. I'm in Arizona.