Sapphire seats are an easy fit.
Undo 2 screws (1 either side) and they ti forward.
Just need to make a catch to lock them in when back.
Rears fit in no problem, just a bit tight.
Thinking of fitting the rear bench of a 3 Door into mine as had one retrimmed in leather years ago

Heres mine as it is now






3 Door rear seats