SS/B Barracuda project

Pictures of factory A-100 van seat covers. Made in 1968 or 69.
Top photo is the width of the cushion seat. 19"
The other 3 photos show the width 18 3/4"and height 17 1/2"of the back panel insert of the seatback. And the face width of the seat back at 19".
I would be interested to hear if these are the same size as what Kramers are offering.