It does not appear to be worn....it
is worn!

Since you are that far deep into the saw, depending on the past history (if you know it), you might think about replacing the oil seal right there. That would give you a good opportunity to inspect the bearing.
I have an 046 I found at the dump, brought it home, tore it apart to clean it and replaced the fuel tank and then fired it up and started cutting firewood. I scorred the piston due to a bad oil seal. I was right there, could have replaced it....should have replaced it then...now I have to do it and replace the piston and possibly the cylinder.
Edit: Unless the oiler parts are scarce for the saw, it is usually easiest to just replace the entire assembly, though some aftermarket parts may need some minor work to get them to fit properly.