I used to own a HTC Titan II and I couldn't really find that many cases for it. It's weird because I had the original HTC Titan, and that had quite a few cases for it--I had an OEM HTC case, and a Case-Mate Tough Case. Case-Mate also made the Barely There, while Incipio made the Feather, NGP, and Silicrylic.
But for the Titan II, Case-Mate made nothing, and Incipio only made the NGP. There's the Triden Aegis and the Ballistic SG, but I think those are a little bit thicker. There are OEM HTC cases, one of them has a kickstand: