Whilst I'm not sure of the name of the colour of your leather, (it will be Connolly by the way), there are experts who can restore leather provided there are no splits in it. Yours looks suitable for this treatment especially the rears. However if you really want to go the distance, new leather seat covers are widely available, there are at least three here in the UK that supply full interior kits. They export, of course !

 

Thanks for your prompt response. The lower seat covers on both front seats are well beyond repair unfortunately. The center console armrest cover is almost completely gone. I would not do the rear because the rear seat is in great shape and it was hardly ever used. I remember sitting back there as a child one single time when my father first purchase the car. I do want to keep the car as original as possible.