Dash light went out.. how to fix..

You should be able to get the light bulbs you need at any auto parts store. You sill have to pull the cluster and simply twist out the lamp holder of the burned out bulb and replace it. Nothing hard, just a little time. Drape some towels over your steering column to protect the column and the cluster.
 
Pep Boys has 'em. I guess everyone probably sells them.

They're come in packages of two. I just got a handfull and replaced them all while I had the panel out. Cleaned out all the dust at the same time. Now it's MUCH easier to read the gauges at night.