Where to find good hard cover iPhone 3GS case?

Hi, I'm looking for a hard cover case for my iPhone 3GS. I would like the front part of the cover to be raised a little higher than the screen in the front so in case it falls on the floor, it won't land on the screen. What brands, websites, or stores do you recommend? I'm only looking for HARD COVER cases, so no silicone or rubberlike materials. I don't want anything more expensive than $25.

Thanks!

Added (1). Something like this, but for the iPhone 3GS:

According to you requirements, you can't miss the onecase.co.uk