Some 30 years back, I had a '70 Olds 442 W-30, that I restored. I had an upholstery shop that I had upholster a few cars for me prior, and had them do up the 442. No one, at that time, made pre sewn kits for the 442, so the owner personally sent out inquiries to obtain the correct grain and gold colored vinyl. The job came out so damned factory, I was thrilled, but he said to take care of it, as, at that time, he had found the last amount of that correct material available. As time went on, I sold the car. I don't think the guy I sold the car to ever knew how lucky he was to have the correct upholstery.
Photo shows a much younger me about to install a new Mondello massaged 455 in the engine bay, but that's the car.