I've just bought a 99 ST Ute and the drivers seat cushion is ripped and worn on the base. Has anyone had the foam and trim on their seat replaced? Or am I better off just buying a whole seat from a wreckers?

I had a quick look at the drivers seat in my parents 03 ST wagon and noticed that it has two knobs to adjust the height of the seat which I don't have. Is that a ute difference or an age difference?

Cheers