I'm roughly the same size as you (5'6", 135lbs). I actually went and tried out a slim fit suit from Kenneth Cole.   http://www1.macys.com/shop/product/kenneth-cole-new-york-suit-black-solid-slim-fit?ID=466041&CategoryID=17788#fn=sp%3D1%26spc%3D182%26ruleId%3D66%26slotId%3D   That one to be exact. I got the size at 36S, but for some strange reason the fitting around the chest was too tight which started to make the lapels bow out quite a bit. I think it could work...