I am assuming you are talking about seats for a Samurai. You can use just about anything you want. I have seen Neon, Geo, Omni, etc in them. I have 76 Corvette seats in mine.
Save your rails.. When you get ready to bolt them to your new seats you may have to slightly modify where the seat rails bolt to the seat. I did this by bolt ing 2 strips of 1/8" X 2" x 14" pieces of flat steel to the underside of each seat. This let me place the seat rail into position and drill out the appropriate holes in the right position to mount the rails to the seat and then the whole shootin match to the tub.
One area of caution might be if you will be instslling or have a console. I need to pull my passenger seat back out to allow me to create and place the brackets that will be necessary to bolt in a 99 Vitara console in my Samurai. I may have to reposition the seat rails on the passenger side slightly to allow a smifgeon more mounting room for the console.
Have Fun..... !
Tux...