Two of my long time keepers are bench seat 71 233 series Pontiac's (both factory 455 HO cars). Correctly reupholstering the lightweight bench seats in these two cars is well over a $2000 job per car and few upholsters are up to task. Years ago I sourced nos fabric and vinyl from Doug at SMS In Oregon. SMS has a huge stock, but is also linked with many other trim suppliers across the country, so they can get one the correct trim. The $1200 you were quoted is VERY reasonable for a front bench CORRECTLY reupholstered in nos fabric and vinyl. Not many auto upholstery shops have the skilled help to properly restore such a seat. tproblem is the way the vinyl and fabric is configured, the thin fabric pulls at a different rate than the vinyl and one can get a really bad line on the vinyl cording that forms the leading edge of the seat bottom cushion. That's only one trouble spot... been there.