I too had been searching for years! However, I found one over the holidays at Starbucks. I've had this mug since December and have had no issues. It is also super easy to clean. Just make sure you rinse it out when you are done with your coffee and not leave it or it will be ruined but that is the case with any travel mug. I've had no issues with leaking either.
http://www.starbucksstore.com/stainl...e&navid=search