PX disc fork bearings

[Pink]

Hi. I will be putting a new mudguard on my PX shortly the usual rust along the seam!! Does anyone any idea what bearings I will need for the steering? There's a slight notch on steering so figured I may as well change bearings at same time! Am I right in thinking there is just one 'ring' each for top and bottom?
cheers in advance
Pink

[henri]

theres a caged bearing top an bottom an inner/outer bearing cups top an bottom ,if theres a notch you'll probably have to replace the races aswell as the bearings , the outers are stuck in the frame , bottom inners on the fork leg an top 1 is the lower of the 2 c nuts on stem , ok,H