The Stronglight A9 can be had for 50 bucks or so and the old "roller bearing" type are really good units. I have them on most of my vintage bikes.

besides replacing the caged bearings with loose balls, here is another trick to resurrect a worn headset: pop the lower cup and fork off after marking them with a sharpie. Rotate the lower cup 90 degrees in one direction, and the fork crown 90 degrees in the other direction. Re-install. Now the worn areas are offset and not interacting with each other.

this trick will give a worn headset another 10 years of life.

no extra charge

Mark Petry
Bainbridge Island, WA USA