Bucket Seat & Foam Info Please

A good automotive upholstery shop will make the foam or rebuild yours when they install the covers. I did this for one of my cars. They carved the foam blocks with a hot knife and shaped until the foam fit the cover.
A lot of people don’t want to pay for that service as recovering the seats is a job that can be done by someone with better than novice skills. But that, headliners and engine machine work I personally leave to a professional. Money well spent.