My climate control backlight burned out recently; I have the automatic CC system with the LCD screen and now it is dark at night. Anyway, I pulled out the unit and found the lightbulb. Easiest fix ever so far! The problem is, I don't know where to find a replacement bulb. It is a tiny white christmas-tree like bulb. I tried an actual christmas-tree bulb but it was too big. Anyone know how to find out what this bulb is? I'd rather not have to replace the whole CC unit 