The HAMA ref. 92429 (hama.de) suits really well to the HTC 7 Mozart, it appears to be designed for it.
Even though the 7 Mozart is just 1 or 2 mm too long, it's perfectly maintained in both portrait and landscape orientations as it seems as large as an Iphone 3GS. And this Gps car holder is pretty nice, i luv the ice design
PS : The product data sheet on Hama website is not up to date, the model I just got is more stylish and bit more round on sides
I assume that 40 € is expensive but as I needed a good holder, to me it's woth it.