Door panels from SMS run about $900. Have to have the seats made up by a local shop from SMS material if you want orig material and pattern, not cheap. The seat upholstery is expensive to have done since they are tuck and roll and it takes more time ($s), you can cheat on it with just stitched seams rather than tuck and droll and ii’s cheaper and comes out pretty good. Don’t know anyone who makes up 62 upholstery for the Olds. Also, Buick Skylark sets are available and I believe they fit, different patterns someone here may know better.