Hey jaeezzy. After you posted this question, I was curious as to where this icon was stored too. I know that D4rKlar has already answered this question correctly (of course) for you, and you probably already have it sorted from that by now, but I thought I would just show you that when I changed the icon under- usr/share/icons/hicolor/18x18/hicolor/general_alarm_on -It changed the icon that you wanted. It should be here regardless of theme I think. Anyway, here's a screenshot just to show you.