For the idiot light bulbs and the back light for LCD Time / Temp display I buy a couple of the 10 packs from this place, great service.

http://www.12velectronics.com/servlet/the-Other/Categories

You can also replace the lamps in the factory sockets with Radio Shack 272-1092 lamps but it is sort of a hassle. Those lamps are also good for replacing switch lights, climate unit lights, and shifter indicator lights. Various forms of modification are required to get them to work.

I use W3W lamps for the gauge backlight lamps, you can get them at any auto parts store but when they look them up on the computer they will be wrong. Take your old bulb with you.

...Lee