Is an active student of Laoshi Robert Chu,
From what I gather he trains in MMA as well.
But it would be better to email him directly, you should be able to reach him at KFO.
I heard of him. But don't know where he is. He learn Wing Chun from Sifu Robert Lee MacField and Mau Chang. The Lineage is Yuen Kay San. Very effective.
I know of Yip Man school in St.charles though...I also know where some people who are related to Mau Chang Yuen Kay San Wing Chun practice at in University City. I go that often to increase my skill in Wing Chun and learn more Theory and Application....