shrouds

Hey guys, I was wondering if any of you know a source for the chrome radiator shrouds on the sides. I hate the way the plastic ones look and would like to get rid of them.

How important are they? I've been running my bike around without the side covers on and it doesn't seem to overheat unless it's real hot out (95*+) and I get caught up in traffic. Once the temp goes up near the first hot mark by the red, it won't come back down once I get moving again. I...