Firs thing check if it's 1", specialized held out pretty long there. Not sure what year my purple/green aluminum Stump Jumper is, but it's still 1"

Threaded, or threadless? If it's 1" and/or threaded you don't have many options. Even the cheap RST forks with steerers you can swap are long gone.

Any marking on the headset? The only headset I've seen with bearings like that are American classic threaded headsets. Same weird fiber reinforced bearings seals.