All of them, only shorty stepsides were made and only shorties fit the extended cab. They're tough to find but be persistent. I've bought a couple of extras, most sell in the $250 range.
Nice to see somebody changing one to clearly make it better looking...I'm a big fan of steppers, particularly on S10's because they were the best proportioned of all of 'em. I have a crew that'll get a 17" frame stretch and a stepside bed.