LG PM-325

Are there any good cases that will prevent key pressing? even with the key guard any key can be pressed and turns the screen on for a few seconds with the option to unlock. if I keep the phone in my pocket this happens way too much and is turning my expected 5 days battery life to only about 2 days (I cut 2 days off the 7 day life since in a 5 day period I might use 60 minutes max talk time).

An alternative would be if I'm missing something to really lock all keys so that the only way I can unlock the phone is with sliding open or only 1 button can activate the screen to unlock.