I am not totally sure about those two generations. But where I would start is by looking up "Seat Rails" or "Seat Brackets" for your generation Celica, and then do the same for the other generation Celica. If they are the same sizes, then you'll know if they fit or not. If they are different, then you'll also have an idea of which place you want to buy your seat adapter from, based on the results of your searches.
Beyond your own Google searches, have a look here:
https://www.kseriesparts.com/seat-rails/And also Amazon, with your vehicle year/make/model entered:
https://www.amazon.com/Best-Sellers-Automotive-Seat-Brackets/zgbs/automotive/3097821011