Well, most of their cases aren't very big, but they have alot of choices! Waterproof, vented, locking, PCB screw-able, you name it! Also have enclosures for keypads, scanners, touchscreens.. pretty awesome!
http://www.okwenclosures.com/index.htm
http://www.okwenclosures.com/products/okw/toptec.htm
