Older Ibis titanium stem, if you can find one (mine isn't for sale), and it'll fit the one-inch steerer and handlebars. Looks similar to the stems already shown in this thread. Low profile, could pass for quill at a glance if the steerer is cut short and uses minimal spacers. But it's straight, no way to adjust the bar upward or downward.

My Ibis is 110mm c-t-c, a little long and low for me while I'm still recovering from neck and shoulder injuries. So I've taken it off temporarily and put on a 90mm angled conventional chunky threadless stem and suitable fatter handlebar (FSA stem and Omega compact drop). If my neck and shoulder improve I may put the Ibis back on.