"A" is not a complete code. According to the attached chart I see 2A, 4A, 5A, 6A, and 7A options, focusing on the A. Limiting that to fastback (body style 63) the list is reduced to 2A, 5A, 6A, 7A. If I recall, interior decor would be 63B, so the list is further reduced to 5A and 6A.
5A appears to be comfortweave, referring to the "knitted vinyl" description.
6A is non-comfortweave
I also included the swatch page which shows #13, knitted vinyl, actually has holes in it.