Here you can see a photograph of what exactly the 1LE suspension consists of. All these are available at your local GM performance parts counter (even the Koni shocks) and at fairly resonable prices compared to many aftermarket suspension pieces. You have Koni double adjustable shock absorbers, 360 lb/inch front springs, 130-180 lb/inch progressive rear springs, 32 mm hollow front sway bar, 19 mm hollow rear sway bar, 1LE panhard rod, 1LE rear lower control arms, 1LE upper and lower front control arms, and 1LE bushings and tranmission mount made of Duron.
In 1998 in order to get the 1LE suspension you had to have a car with the 1SF equipment group which means just the basics. No traction control, no power seats, no power windows, no power locks, no cruise control, no theft deterrent, no fog lights, no rear floor mats, no remote hatch release, no keyless entry and no body side moldings. Pretty much the stuff that everyone else has. The QLC tire option is also required, Z rated Goodyear Eagle GSC tires. T-tops were not offered in conjunction with 1LE. About the only options that were allowed were a front license plate mount, chrome wheels, and oddly upgraded stereos and an automatic tranmission (but 3.23 rear end gears were required with the automatic). I have never seen a 1LE car with more than just the basic standard issue AM/FM cassette radio though. My car has the front plate mount, the chrome wheels, and the rear defroster deleted from the factory.