I'm building some stems from cro-mo. I need to have some top caps machined from steel, preferably cro-mo. If you've ever seen a Salsa quill stem, think one of those, except for steel and not aluminum -- these will be brazed in place. Need 2, could go as high as 10 if it gets the price low. I will send you pictures of a Salsa top cap, and dimensions.
Email me at pruckelshaus@ gmail . com if you can help.