Hmmm. Perhaps not a thrust bearing. There is an axial load on the 6003. It's held in position by the adjustment pin, if I remember correctly. A taper bearing might be a better solution - SKF 30202
Oh.. ... I've not changed mine yet , maybe I should as I've recently replaced the two main needle roller bearings.
An interesting thought going for a tapered roller bearing , I had a BMW that used a similar thing on the shaft drive flexible joints .
I've changed Nell's once and the engine I'm working on now probably needs it done as you can feel that it's no longer smooth. Hence the question.