sideview mirror control's lights don't work

Ok, does anyone know where you can buy the bulbs for the sideview mirror's controls. It is the control that is right next to the fog light button on a 95 Aurora. I had to replace the whole dash piece that had the indicator lights on it. I was disappointed that it didn't come with the controls and two of the lighted directions are burnt out. It is actually just one bulb that is burnt out though. But the bulb it tiny. I went to two GM dealers and to Napa and none of them knew where to get one.