Please Help Me - Posting for my 70 year old grandfather

To be clear, you have two choices. You can completely re-upholster the seats to be like original from a place like Legendary and they are high quality and you will spend several thousand dollars for the kits and the labor to install them or you can buy a universal non-original set that will do the job and spend $200-$400 for the kit and someone to install it. A local upholsterer can help you here.