Why the ham sandwich someone isn't making a quill stem with a removeable faceplate is completely beyond me.
They do. Or at least, they did. Have in my hand right now a very nice 100mm Nitto with a removable top plate on the clamping section. 26mm clamp.
No model name or other identifying markks other than 'OU' on the stem section below the sizing and min mark.
Don't have a picture handy, sorry. But I'm holding on to this for a furure personal project.