Here is a picture of Jim Carter’s maroon color ‘Spanish Grain’ vinyl seat cover installed in my truck. As noted earlier, it is not the exact grain pattern or stitch line as the original cover, but it’s very similar. As I recall, another member from Georgia?- a while back located a source for material a bit more like the original grain if you choose to make your own.
For comparison, here is a swatch of original seat cover from a 1950 seat.
