The "seat" that came with the car was a kevlar bride seat. The most uncomfortable thing I ever sat in, lol.
Made adapter with 1"× 3/16" flat stock. Rear is from my 93 eg hatch it's not a perfect fit but does the job and matches the fronts. The fronts are a set I've had for years. Just bought them at the time because they are in great shape for the age of em.
The motor went a month after I bought it.
And that's the eg that donated the rear seat.