JunkYardBike,

The cones are definitely damaged, as you've seen. They may be interchangeable with cones from similar Shimano models: take 'em into a shop, ask to rummage through their parts box, and squint at whatever you find.

The ball bearings may *appear* fine to the naked eye, but believe me, if the cone looks like that they are NOT. Just yesterday I overhauled an old headset and was ready to replace it because it felt so rough. The ball bearings looked perfectly shiny and new, but I tried replacing them anyway. $1 worth of bearings later, the headset was running flawlessly smooth. The moral of the story is: bearing damage can be invisible to the naked eye. Do yourself a favor and get new Grade 25 bearings in the right size. Absolutely *the best* $1-5 maintenance you could ever do on your bike!