Bike noise, creak, click, creaks, clicks, clicking, pinging sound - help

I cleaned and re-greased the bearings today. However, I made the clicking worse. The line along the cone that show where the balls are running had a few rough bits.

Can you buy a cone separately?

take the cone to a bike shop and ask if they have a spare, if they are nice they will dig you one out the spares for free.

as novocaine has mentioned, you should check the faces on the inside of your hub for pitting. If they are rough, then you cant resolve it.

Youll still be able to ride the wheel, but it just wont spin super smooth. Perfectly acceptable though.