it sounds like you need a ST (aka small tall) size, which matches roughly 6' to 6'2", 36" chest, and 30" to 31" waist for a lot of manufacturers. look into xcel/quicksilver/oneill.

an example i found on amazon:

http://www.amazon.com/Xcel-Offset-Wetsuit-Black-Small/dp/B00KXA0PDY/ref=sr_1_7?s=sporting-goods&ie=UTF8&qid=1445298666&sr=1-7&keywords=xcel+3%2F2mm+wetsuit&refinements=p_72%3A1248957011