At one time, just like most other components, there were very few options. Today, there are more styles than I can count. I used to build my own bikes up from the frame, without the internet. Now, that is impossible because of the dozen or so standards being produced. Unless, we're talking high end headset, it may be difficult to find a replacement part.. Mid level headsets will cost in the $20-30 range. I've never seen a headset with no ball bearings, so cannot help you there. I suggest, take the headset off, take some pics, measure diameters, inside and out, then go to a LBS.