what kind of stem are you looking for? quill, threadless, bar clamp dia.? if threadless, how many spacers o you have to play around with? Pickings are getting slim for quill stems but there are plenty of options for threadless. Why stop your spreadsheet at 110mm when stems are easily found up to 120-130mm? A steep angled stem will be lighter and stiffer than a stem raiser.

here's a graphical calculator you can play with. A 120mm*35degree stem gets close to your goal.

http://alex.phred.org/stemchart/Default.aspx