Are the bearings replaceable?

I think my pedals need new bearings. My Vector 3 pedals are 2 years old but lightly used maybe 1000km. When I check the left (power pedal) the rotation felt sticky like the bearings were dirty.

Diassembled them (good instructions) and they were clean inside. Cleaned them with solvent and regreased,  but still have a grinding (sticky spot). Tried light touch with 600 gr sandpaper to see if there were any filings or burrs, but still feel crunchy.  Since the electronics are in the shaft don't think trying to be more aggressive with cleaner would help.

Any ideas.